the invention especially relates to compounds of the general formula i in which any alkyl part of any of the groups r 1 to r 3 , which may be straight chained or branched , contains up to 12 carbon atoms , preferably up to 10 carbon atoms , more preferably up to 9 carbon atoms , any alkenyl or alkynyl part of any of the substituents r 1 to r 3 contains up to 12 carbon atoms , preferably up to 10 carbon atoms , more preferably up to 9 carbon atoms , any cycloalkyl part of any of the substituents r 1 to r 3 contains from 3 to 10 carbon atoms , preferably from 3 to 8 carbon atoms , more preferably from 3 to 6 carbon atoms , any saturated or unsaturated chain , especially carbon chain , contains from 3 to 10 chain members , preferably from 4 to 6 carbon atoms , and any aryl part of any of the substituents r 1 to r 3 contains 6 , 10 or 14 carbon atoms , preferably 6 or 10 carbon atoms , and in which each optionally substituted group independently is substituted by one or more halogen atoms or nitro , cyano , alkyl , preferably c 1 - 6 alkyl , cycloalkyl , preferably c3 - 6 cycloalkyl , cycloalkenyl , preferably c 3 - 6 cycloalkenyl , haloalkyl , preferably c 1 - 6 haloalkyl , halocycloalkyl , preferably c3 - 6 halocycloalkyl , alkoxy , preferably c 1 - 6 alkoxy , haloalkoxy , preferably c 1 - 6 haloalkoxy , phenyl , halo - or dihalo - phenyl or pyridyl groups . any alkyl , alkenyl or alkynyl group may be linear or branched . a 4 - to 6 - membered heterocyclic group may be any heterocyclic group with 4 to 6 ring atoms , interrupted by one or more heteroatoms selected from sulfur , nitrogen , and oxygen , preferably oxygen . a halogen atom suitably denotes a fluorine , chlorine or bromine atom . the invention especially relates to compounds of the general formula i in which r 1 represents a c 1 - 10 alkyl , c 3 - 6 cycloalkyl , c 3 - 8 cycloalkyl - c 1 - 6 alkyl , c 1 - 6 alkoxy , c 1 - 10 alkoxy - c 1 - 6 alkyl or phenyl group . preferably r 1 represents a c 1 - 8 , suitably c 1 - 6 , alkyl group , especially a branched alkyl group , more especially secondary and tertiary alkyl groups as secondary butyl , tertiary butyl and tertiary amyl groups . more preferably , r 1 represents a t - butyl or t - amyl group . the invention further especially relates to compounds of the general formula i in which r 2 and r 3 each independently represent a hydrogen atom , a c 1 - 12 alkyl , especially c 3 - 10 alkyl , c 2 - 6 alkenyl , c 2 - 6 alkynyl , c 3 - 8 cycloalkyl - c 1 - 6 alkyl , c 3 - 8 cycloalkyl , phenyl , phenyl - c 1 - 6 alkyl , especially benzyl , halophenyl - c 1 - 6 alkyl or pyridyl - c 1 - 6 alkyl group , or r 2 and r 3 together represent a saturated carbon chain containing three to eight carbon atoms while optionally one or more additional oxygen atoms may be present in the chain and which chain may optionally be aryl - or cycloalkyl - fused . preferably r 2 and r 3 each independently represent a hydrogen atom , a c 2 - 12 alkyl , c 2 - 5 alkenyl , c 5 - 7 cyclo - c 1 - 2 alkyl , c 5 - 7 cycloalkyl or phenyl - c 1 - 2 alkyl group , or r 2 and r 3 together represent a saturated chain containing four or five carbon atoms while optionally additional oxygen atoms may be present and which chain optionally may be aryl - or cycloalkyl - fused , especially cyclopentyl , cyclohexyl or cycloheptyl fused , each of the above groups optionally substituted by one or more halogen atoms , especially chlorine and / or fluorine atoms , or c 1 - 4 alkyl , c 1 - 4 haloalkyl , c 4 - 6 cycloalkenyl or c 1 - 4 alkoxy groups . the invention also especially relates to compounds of the general formula i in which r 2 represents a hydrogen atom or a methyl group , preferably a hydrogen atom . the invention especially relates to compounds of the general formula i in which n represents 0 , 1 or 2 , particularly 0 . a particular preferred sub - group of compounds of the general formula i is that in which r 1 represents a butyl , pentyl or phenyl group , especially a t - butyl or t - amyl group . another particular sub - group is that in which r 2 and r 3 each independently represent a hydrogen atom or a linear or branched c 1 - 12 alkyl group , especially a c 1 - 10 alkyl group , an allyl , c 3 - 7 cycloalkyl optionally fused with a cyclohexyl group , benzyl or phenyl group , or r 2 and r 3 together represent a saturated c 4 - 7 carbon chain , especially a c 4 - 6 carbon chain , which optionally may contain an additional oxygen atom and which optionally may be fused with a cyclohexyl ring , each of the above groups optionally substituted by a fluorine , chlorine or bromine atom or one or two methyl groups , a t - butyl , cyclohexyl , cyclohexenyl , phenyl or pyridyl group . the present invention further provides a process for the preparation of compounds of the general formula i as defined hereinbefore or acid - addition salts thereof , which process comprises reaction of a compound of the general formulae iia or iib ## str3 ## wherein n is 0 , 1 or 2 and r 1 is defined hereinbefore , with a compound of the general formula iii ## str4 ## in which r 2 and r 3 are as defined hereinbefore , under reducing conditions . suitable reducing conditions for the reductive amination are well known in the literature . see for instance j . march , advanced organic chemistry , j . wiley & amp ; sons , new york , 1985 . suitable reducing agents are formic acid ( leuckart - wallach reduction ), complex metal hydrides such as cyanoborohydride or hydrogen gas together with a hydrogenation catalyst , e . g . raney nickel . the starting compounds of formulae iia and iib are novel . therefore , the invention relates also to the novel starting compounds of formulae iia and iib . the compounds of formula iia can be prepared according to reaction scheme 1 , in which the following expressions have been used : step 1 : &# 34 ; strong base &# 34 ; represents a metal organic compound , preferably a metal dialkylamide or an alkali metal alkane , in particular lithium diisopropylamide ; &# 34 ; allylhalide &# 34 ; represents allylchloride , allylbromide or allyliodide . step 2 : &# 34 ; peroxoacid &# 34 ; represents suitably an organic peroxoacid , preferably an optionally substituted perbenzoic acid , in particular m - chloroperbenzoic acid . step 3 : &# 34 ; reduction &# 34 ; represents a reduction process carried out with a complex metal hydride , preferably a complex aluminum hydride or borohydride , in particular lithium aluminum hydride . step 4 : &# 34 ; oxidation &# 34 ; represents a oxidation process carried out in the presence of agents being capable of oxidizing primary alcohols to aldehydes , in particular with dimethyl sulfoxide in the presence of oxalyl chloride and a base . step 5 : &# 34 ; aldol condensation &# 34 ; represents a condensation process , preferably carried out in the presence of a base such as a metal dialkylamide or a metal hydroxide or a metal alkoxide . step 6 : &# 34 ; hydrogenation &# 34 ; represents a hydrogenation process carried out in the presence of a heterogeneous catalyst , in particular in the presence of raney nickel and / or palladium . ## str5 ## wherein r represents a c 1 - 10 alkyl , c 3 - 6 cycloalkyl , c 3 - 8 cycloalkyl - c 1 - 6 alkyl , c 1 - 10 alkoxy - c 1 - 6 alkyl , phenyl or benzyl group . the compounds of formula iib can be obtained from formula iia according to reaction scheme 2 , in which the following expressions have been used : &# 34 ; oxidation &# 34 ;: as described for step 4 of scheme 1 ; ## str6 ## wherein n is 1 or 2 ; r &# 34 ; represents a c 1 - 10 alkyl , c 3 - 6 cycloalkyl , c 3 - 8 cycloalkyl - c 1 - 6 alkyl , c 1 - 10 alkoxy - c 1 - 6 alkyl or phenyl group ; x denotes halogen , preferably cl , br or i . the compounds ( iic ) wherein n is 2 may be further reacted to convert the aldehyde moiety to an imino group followed by reduction to form the compounds of formula i wherein n is 3 . starting compounds of the general formula iii are well known in the literature , and many of them are commercially available . the reductive amination process of the present invention is suitably carried out in the presence of an organic solvent , for example an ether , an alcohol or a carboxylic acid such as acetic acid . the process is suitably carried out at a temperature in the range of 0 ° to 150 ° c ., especially between 40 ° and 120 ° c ., in the case of formic acid as reducing agent or at temperatures between 0 ° and 50 ° c . in the case of complex borohydrides as reducing agents . in an alternative process for the preparation of the compounds of the present invention the starting compound of formula iia is first converted into the corresponding aminospiro ( 4 , 5 ) decane compound , for instance by reaction with hydroxylamine followed by reduction of the obtained oxime . the 3 - amino compound is thereafter alkylated , especially with a ketone or aldehyde under suitable reducing conditions or with an alkylating agent . the reaction of the ketone starting material and hydroxylamine is well known in the literature . the reaction may be carried out in an organic solvent / water mixture at temperature between 20 ° and 100 ° c . the reduction of the oxime compounds is also well known in the literature . the reduction can be carried out with complex metal hydrides , for instance lithium aluminium hydride , in an organic solvent , e . g . tetrahydrofuran , at temperatures between 40 ° and 80 ° c . the alkylation of amines using ketones or aldehydes is well known in the literature , and is described hereinbefore . the alkylation using alkylating agents is also well known in the literature . alkylating agents , for instance ( substituted ) alkyl halides may be used in suitable , inert organic solvents at temperatures between 40 ° and 100 ° c . the present invention also provides a process for the preparation of compounds of the general formula i as defined hereinbefore , or acid addition salts thereof , and in which n is 1 , which process comprises reduction of a compound of the general formula iia as defined hereinbefore to an alcohol , activation of the alcohol , followed by reaction with hydrogen cyanide , a salt thereof or with trialkylsilyl cyanide in the presence of a lewis acid , followed by reduction of the obtained cyanide group and alkylation of the amine obtained , especially with a ketone or aldehyde under suitable reducing conditions or an alkylating reagent . the reduction of the carbonyl group of the starting compound of formula iia can be carried out according to methods well known in the literature , for example by reduction with a complex metal hydride such as sodium borohydride . the activation of the alcohol can also be carried out according to methods well known in the literature , for instance by reaction with alkyl - or arylsulfonylchloride . the substition of the activated hydroxy group is suitably carried out in a polar organic solvent , for instance an alcohol , an ether or a ketone using hydrogen cyanide or a salt thereof . the substitution with a trialkylsilyl cyanide , as for example with trimethylsilyl cyanide , is carried out in an aprotic solvent , for instance in an ether or a halogenalkane , such as dichloromethane , in the presence of a lewis acid . the reduction of the cyano group is also well known in the literature , and can be performed as described hereinbefore . the alkylation of the 3 - aminomethyl group may be carried out as described hereinbefore . the present invention also provides a process for the preparation of a compound of the general formula i as defined hereinbefore , or acid addition salts thereof , and in which n represents 2 , which process comprises reaction of a compound of the general formula iia as defined hereinbefore , with cyanoacetic acid ( knoevenagel - doebner reaction ) followed by reduction of the compound obtained into an amine , and alkylation of the amine , especially with a ketone or aldehyde under suitable reducing conditions or an alkylating agent . the reaction of the ketone starting material and cyanoacetic acid is suitably carried out in a polar organic solvent such as pyridine . the reduction of the cyano group and the alkylation of the 3 - aminoethyl group may be carried out as described hereinbefore . suitably all reactions are carried out using substantially equimolar amounts of the reactants . however , it can be expedient to use one reactant in excess . it will be appreciated that in addition to the above described reaction steps additional chemical modifications can be made to the compounds and intermediates , e . g . introduction or amendment of certain substituents , additional alkylation reactions etc . the invention also provides fungicidal compositions comprising at least one of the compounds according to general formula i or an acid addition salt thereof , as well as methods of combating fungi at a locus comprising treatment of the locus with a compound of formula i or an acid addition salt thereof as defined hereinbefore , or with a composition as defined in this specification . the locus to be treated especially comprises plants subject to or subjected to fungal attack , seeds of such plants or the medium in which the plants are growing or are to be grown . the fungicidal composition comprises a carrier and , as active ingredient , a compound of the general formula i or an acid addition salt thereof . a method of making such a composition is also provided , which comprises bringing a compound of the general formula i as defined above or an acid addition salt thereof into association with at least one carrier . such a composition may contain a single compound or a mixture of several compounds of the present invention . it is also envisaged that different isomers or mixtures of isomers may have different levels or spectra of activity and thus compositions may comprise individual isomers or mixtures of isomers . the invention further relates to the use as a fungicide of a compound of formula i as defined hereinbefore or a composition as defined hereinbefore . a composition according to the invention preferably contains from 0 . 5 to 95 % by weight of active ingredient . a carrier in a composition according to the invention is any material with which the active ingredient is formulated to facilitate application to the locus to be treated , which may for example be a plant , seed or soil , or to facilitate storage , transport or handling . a carrier may be a solid or a liquid , including a material which is normally gaseous but which has been compressed to form a liquid , and any of the carriers normally used in formulating fungicidal compositions may be used . suitable solid carriers include natural and synthetic clays and silicates , for example natural silicas such as diatomaceous earths ; magnesium silicates , for example talcs ; magnesium aluminium silicates , for example attapulgites and vermiculites ; aluminium silicates , for example kaolinites , montmorillonites and micas ; calcium carbonate ; calcium sulphate ; ammonium sulphate ; synthetic hydrated silicon oxides and synthetic calcium or aluminium silicates ; elements , for example carbon and sulphur ; natural and synthetic resins , for example coumarone resins , polyvinyl chloride , and styrene polymers and copolymers ; solid polychlorophenols ; bitumen ; waxes , for example beeswax , paraffin wax , and chlorinated mineral waxes ; and solid fertilisers , for example superphosphates . suitable liquid carriers include water ; alcohols , for example isopropanol and glycols ; ketones , for example acetone , methyl ethyl ketone , methyl isobutyl ketone and cyclohexanone ; ethers ; aromatic or araliphatic hydrocarbons , for example benzene , toluene and xylene ; petroleum fractions , for example , kerosine and light mineral oils ; chlorinated hydrocarbons , for example carbon tetrachloride , perchloroethylene and trichloroethane . mixtures of different liquids are often suitable . fungicidal compositions are often formulated and transported in a concentrated form which is subsequently diluted by the user before application . the presence of small amounts of a carrier which is a surface - active agent facilitates this process of dilution . thus preferably at least one carrier in a composition according to the invention is a surface - active agent . for example the composition may contain at least two carriers , at least one of which is a surface - active agent . a surface - active agent may be an emulsifying agent , a dispersing agent or a wetting agent ; it may be nonionic or ionic . examples of suitable surface - active agents include the sodium or calcium salts of polyacrylic acids and lignin sulphonic acids ; the condensation products of fatty acids or aliphatic amines or amides containing at least 12 carbon atoms in the molecule with ethylene oxide and / or propylene oxide ; fatty acid esters of glycerol , sorbitol , sucrose or pentaerythritol ; condensates of these with ethylene oxide and / or propylene oxide ; condensation products of fatty alcohol or alkyl phenols , for example p - octylphenol or p - octylcresol , with ethylene oxide and / or propylene oxide ; sulphates or sulphonates of these condensation products ; alkali or alkaline earth metal salts , preferably sodium salts , of sulphuric or sulphonic acid esters containing at least 10 carbon atoms in the molecule , for example sodium lauryl sulphate , sodium secondary alkyl sulphates , sodium salts of sulphonated castor oil , and sodium alkylaryl sulphonates such as dodecylbenzene sulphonate ; and polymers of ethylene oxide and copolymers of ethylene oxide and propylene oxide . the compositions of the invention may for example be formulated as wettable powders , dusts , granules , solutions , emulsifiable concentrates , emulsions , suspension concentrates and aerosols . wettable powders usually contain 25 , 50 or 75 % w of active ingredient and usually contain in addition to solid inert carrier , 3 - 10 % w of a dispersing agent and , where necessary , 0 - 10 % w of stabiliser ( s ) and / or other additives such as penetrants or stickers . dusts are usually formulated as a dust concentrate having a similar composition to that of a wettable powder but without a dispersant , and may be diluted in the field with further solid carrier to give a composition usually containing 1 / 2 - 10 % w of active ingredient . granules are usually prepared to have a size between 10 and 100 bs mesh ( 1 . 676 - 0 . 152 mm ), and may be manufactured by agglomeration or impregnation techniques . generally , granules will contain 1 / 2 - 75 % w active ingredient and 0 - 10 % w of additives such as stabilisers , surfactants , slow release modifiers and binding agents . the so - called &# 34 ; dry flowable powders &# 34 ; consist of relatively small granules having a relatively high concentration of active ingredient . emulsifiable concentrates usually contain , in addition to a solvent and , when necessary , co - solvent , 1 - 50 % w / v active ingredient , 2 - 20 % w / v emulsifiers and 0 - 20 % w / v of other additives such as stabilisers , penetrants and corrosion inhibitors . suspension concentrates are usually compounded so as to obtain a stable , non - sedimenting flowable product and usually contain 10 - 75 % w active ingredient , 0 . 5 - 15 % w of dispersing agents , 0 . 1 - 10 % w of suspending agents such as protective colloids and thixotropic agents , 0 - 10 % w of other additives such as defoamers , corrosion inhibitors , stabilisers , penetrants and stickers , and water or an organic liquid in which the active ingredient is substantially insoluble ; certain organic solids or inorganic salts may be present dissolved in the formulation to assist in preventing sedimentation or as anti - freeze agents for water . aqueous dispersions and emulsions , for example compositions obtained by diluting a wettable powder or a concentrate according to the invention with water , also lie within the scope of the invention . the said emulsions may be of the water - in - oil or of the oil - in - water type , and may have a thick ` mayonnaise ` like consistency . the composition of the invention may also contain other ingredients , for example other compounds possessing herbicidal , insecticidal or fungicidal properties . of particular interest in enhancing the duration of the protective activity of the compounds of this invention is the use of a carrier which will provide a slow release of the fungicidal compounds into the environment of the plant which is to be protected . such slow - release formulations could , for example , be inserted in the soil adjacent to the roots of a plant , or could include an adhesive component enabling them to be applied directly to the stem of a vine plant . the present invention still further provides the use as a fungicide of a compound of the general formula i as defined above or a composition as defined above . the present invention is of wide applicability in the protection of crop plants against fungal attack . typical crops which may be protected include cereals , especially wheat and barley , rice , vines , vegetales , especially sugarbeet , potatoes , tomatoes , top fruit , especially apples , and cucumber . the duration of protection is normally dependent on the individual compound selected , and also a variety of external factors , such as climate , whose impact is normally mitigated by the use of a suitable formulation . the compounds of the present invention are especially suitable to combat erysiphe graminis in cereals . to a cold (- 20 ° c .) solution of lithium diisopropylamide ( 0 . 2 mol ) in tetrahydrofuran ( 300 ml ) is added ethyl 4 - t - butylcyclohexylcarboxylate ( 42 . 5 g , 0 . 2 mol ) in tetrahydrofuran ( 100 ml ). the reaction mixture is stirred for 1h at - 20 ° c . and is then cooled to - 70 ° c . allylbromide ( 24 . 5 g , 0 . 2 mol ) is added and the reaction mixture is allowed to warm up to room temperature over night . the reaction mixture is then quenched with saturated aqueous ammonium chloride solution ( 200 ml ) and most of the organic solvent is distilled off under reduced pressure . from the remainder the product is extracted with toluene ( 500 ml ). the organic layer is separated , dried with magnesium sulphate and concentrated in vacuo to yield an oil ( 51 g ). distillation in vacuo ( b . p . 75 °- 82 ° c ./ 0 . 03 mbar ) furnishes the pure product as a colourless oil ( 46 g ). to a solution of 3 - chloroperbenzoic acid ( 25 g , 0 . 080 mol ) in dichloromethane ( 200 ml ) is added ethyl 1 - allyl - 4 - t - butylcyclohexylcarboxylate ( 17 g , 0 . 067 mol ) in dichloromethane ( 200 ml ). the reaction mixture is stirred at room temperature over night . precipitated 3 - chlorobenzoic acid is filtered off and the filtrate is washed twice with saturated aqueous sodium bicarbonate and 5 % aqueous sodium bisulfite . drying and evaporation of the solvent yields the product as a colourless oil ( 17 g ). to lithium aluminumhydride ( 5 . 0 g , 0 . 132 mol ) in tetrahydrofuran ( 100 ml ) is added 1 -( 2 , 3 - epoxyprop - 1 - yl )- 4 - t - butylcyclohexylcarboxylate ( 17 g , 0 . 063 mol ) as a solution in tetrahydrofuran ( 100 ml ) at room temperature . the mixture is stirred over night and excess lah is hydrolysed by careful addition of saturated aqueous sodium sulfate . precipitated inorganics are filtered and the filtrate is dried with magnesium sulfate . evaporation of the solvent furnishes 14 g of crude product which is recrystalized from light petroleum to yield the pure product ( 8 g ) as colourless crystals which melt at 93 ° c . to a solution of oxalylchloride ( 21 . 0 g , 0 . 165 mol ) in dichloromethane ( 50 ml ) is added dimethylsulfoxide ( 21 ml ) in dichloromethane ( 50 ml ) at - 70 ° c . the reaction mixture is stirred for 5 min . and 1 - hydroxy - methyl - 1 -( 2 - hydroxyprop - 1 - yl )- 4 - t - butylcyclohexane ( 17 . 0 g , 0 . 075 mol ) is added . the reaction mixture is stirred for 30 min . at - 70 ° c . triethylamine ( 100 ml ) is then added and the reaction mixture is allowed to warm to room temperature . the reaction mixture is washed with water and brine . the organic layer is dried with magnesium sulfate and evaporated in vacuo to yield 15 g of a crystalline solid which melts at 68 °- 72 ° c . it is used in the next step without further purification . to a solution of 1 -( propan - 2 - one - 1 - yl )- 4 - t - butylcyclohexane carboxaldehyde ( 14 g , 0 . 0625 mol ) in tetrahydrofuran ( 200 ml ) cooled to - 70 ° c . is added a 2m solution of lithium diisopropylamide ( 35 ml ) in tetrahydrofuran . the mixture is stirred at - 70 ° c . for 1h and is then allowed to warm to - 20 ° c . aqueous saturated ammonium chloride ( 100 ml ) is then added and the phases are separated . the organic layer is dried with magnesium sulfate and evaporated in vacuo . the crude product is dissolved in toluene ( 200 ml ) to which p - toluenesulfonic acid ( 0 . 3 g ) is added . the solution is heated to reflux for 30 min . after cooling the acid is removed by washing with 5 % aqueous sodium carbonate . drying and evaporating the solvent yields 11 g of a thick oil which is purified by flash chromatography ( silica , light petroleum / ethylacetate 10 : 1 ). 8 - t - butyl - spiro 4 , 5 ! dec - 3 - en - 2 - one ( 7 . 5 g , mol ) in ethanol ( 100 ml ) is hydrogenated on a mixture of raney nickel and palladium on charcoal ( 50 ° c ./ 60 psi ) until hydrogen uptake ceases . the catalyst is filtered off and the solvent evaporated in vacuo . the crude product is purified by flash chromatography ( silica , toluene / acetone 10 : 1 ). m . p . 78 °- 82 ° c . the title compounds are prepared by dissolving the ( substituted ) spiro ( 4 , 5 ) decane - 2 - one ( 4 mmol ), an amine of formula hnr 2 r 3 ( 4 . 2 mmol ) and zinc chloride 0 . 4 g ( 3 mmol ) in 20 ml dry methanol . sodium cyanoborohydride ( 0 . 31 g , 5 mmol ) is then added and the mixture is stirred over night at room temperature . the solvent is then distilled off in vacuo and the residue is taken up in ethylacetate ( 20 ml ), washed with 1n sodium hydroxide ( 20 ml ) and water ( 20 ml ). the organic layer is dried with magnesium sulphate , filtered and evaporated in vacuo to yield the crude product which might be further purified by chromatography on silica using mixtures with varying amounts of toulene / ethylacetate / triethylamine as the eluent . the compounds according to the invention have been prepared via the above described method as detailed below in table ia : table ia__________________________________________________________________________formula i ( n = 0 ) exampler . sub . 1 r . sub . 2 r . sub . 3 acid__________________________________________________________________________1 t - butyl -- ch . sub . 2 ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 ch . sub . 2 -- -- 2 t - butyl h 3 - heptyl -- 3 t - butyl h cyclohexyl -- 4 t - butyl cis --- ch . sub . 2 ch ( ch . sub . 3 ) och ( ch . sub . 3 ) ch . sub . 2 -- -- 5 t - butyl -- ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 -- 6 t - butyl h 3 - methylcyclohexyl -- 7 t - butyl h 4 - methylcyclohexyl -- 8 t - butyl h i - butyl -- 9 t - butyl methyl cyclohexyl -- 10 t - butyl h cyclopentyl -- 11 t - butyl h cycloheptyl -- 12 t - butyl h 4 - chlorobenzyl -- 13 t - butyl --( ch . sub . 2 ). sub . 2 -- o --( ch . sub . 2 ). sub . 2 -- -- 14 t - butyl n - butyl n - butyl -- 15 t - butyl methyl phenyl -- 16 t - butyl h phenyl -- 17 t - amyl h cyclohexyl -- 18 t - butyl -- ch . sub . 2 ch ( ch . sub . 3 )( ch . sub . 2 ). sub . 3 -- -- 19 t - amyl --( ch . sub . 2 ). sub . 2 ch ( ch . sub . 3 )( ch . sub . 2 ). sub . 2 -- -- 20 t - amyl methyl cyclohexyl -- 21 t - butyl --( ch . sub . 2 ). sub . 6 -- -- 22 t - butyl -- h methyl -- 23 t - butyl -- h ethyl -- 24 t - butyl -- h n - propyl -- 25 t - butyl -- h i - propyl -- 26 t - butyl -- h n - butyl -- 27 t - butyl -- h t - butyl -- 28 t - amyl -- h methyl -- 29 t - amyl -- h ethyl -- 30 t - amyl -- h n - propyl -- 31 t - amyl -- h n - butyl -- 32 t - amyl -- h i - butyl -- 33 t - amyl -- h t - butyl -- 34 t - amyl -- h phenyl -- 35 t - amyl --( ch . sub . 2 ). sub . 5 -- -- 36 t - amyl -- ch . sub . 2 ch ( ch . sub . 3 )-- o -- ch ( ch . sub . 3 ) ch . sub . 2 -- -- 37 t - butyl -- h -- h -- 38 t - amyl -- h -- h -- 39 n - butyl -- h phenyl -- 40 n - butyl -- h cyclohexyl -- 41 n - butyl -- h methyl -- 42 n - butyl -- h ethyl -- 43 n - butyl -- h n - propyl -- 44 n - butyl -- h i - propyl -- 45 n - butyl -- h n - butyl -- 46 n - butyl -- h i - butyl -- 47 n - butyl -- h t - butyl -- 48 n - butyl n - butyl phenyl -- 49 t - amyl -- h cyclohexyl -- 50 t - amyl methyl phenyl -- 51 t - amyl methyl methyl -- 52 t - amyl methyl ethyl -- 53 t - amyl methyl n - propyl -- 54 phenyl -- h methyl -- 55 phenylbutylphenyl -- 56 phenyl -- h cyclohexyl -- 57 phenyl -- ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 -- 58 phenyl -- ch . sub . 2 ch ( ch . sub . 3 )-- o -- ch ( ch . sub . 3 ) ch . sub . 2 -- -- 59 -- h methyl methyl -- 60 t - amyl methyl n - hexyl -- 61 phenyl methyl n - hexyl -- 62 cyclohexyl -- h n - butyl -- 63 cyclohexyl -- h i - propyl -- 64 cyclohexyl -- h n - pentyl -- 65 cyclohexyl -- h t - amyl -- 66 cyclohexyl -- h s - butyl -- 67 t - butyl methyl ethyl -- 68 t - butyl ethyl ethyl -- 69 t - butyl n - hexyl n - hexyl -- 70 t - butyl -- h n - pentyl -- 71 t - butyl -- h allyl -- 72 t - butyl ethyl n - pentyl -- 73 t - butyl n - n - pentyl -- propyl74 t - butyl n - butyl n - pentyl -- 75 t - butyl s - butyl n - pentyl -- 76 t - butyl i - n - pentyl -- propyl77 t - butyl cyclohexyl n - pentyl -- 78 t - butyl methyl n - pentyl -- 79 t - butyl allyl cyclohexyl -- 80 t - butyl methyl cyclohexyl -- 81 t - butyl -- h t - butyl -- 82 t - butyl -- h cyclohexylmethyl -- 83 t - butyl -- h 1 - ethylpropyl -- 84 t - butyl -- h 2 - methylcyclohexyl -- 85 t - butyl -- h 2 - norbornyl -- 86 t - butyl -- h 2 - adamantyl -- 87 t - butyl -- h 3 - methylcyclohexyl -- 88 t - butyl -- h 4 - methylcyclohexyl -- 89 t - butyl -- h 4 - ethylcyclohexyl -- 90 t - butyl -- h 2 - ethylcyclohexyl -- 91 t - butyl methyl cyclohexylmethyl -- 92 t - butyl ethyl cyclohexylmethyl -- 93 t - butyl propyl cyclohexylmethyl -- 94 t - butyl methyl 1 - ethylpropyl -- 95 t - butyl ethyl 1 - ethylpropyl -- 96 t - butyl n - 1 - ethylpropyl -- propyl97 t - butyl i - i - propyl -- propyl98 t - butyl -- h cyclohexylmethyl -- 99 t - butyl -- h 1 - propylbutyl -- 100 t - butyl -- h 2 - cyclohexylethyl -- 101 t - butyl -- h 2 - heptyl -- 102 t - butyl -- h 3 - heptyl -- 103 t - butyl allyl allyl -- 104 t - butyl -- h n - heptyl -- 105 t - butyl -- h 2 - octyl -- 106 t - butyl -- h 1 , 1 , 3 - trimethylbutyl -- 107 t - butyl -- h 1 , 5 - dimethylhexyl -- 108 t - butyl -- h 2 - cyclohex - 1 - enyl - -- ethyl109 t - butyl -- h 4 - t - butyl - cyclohexyl -- 110 t - butyl -- h 1 , 3 - dimethylbutyl -- 111 t - butyl -- h 2 - t - butylethyl -- 112 t - butyl -- h 1 , 3 - dimethylpentyl -- 113 cyclohexyl - -- ch . sub . 2 ch . sub . 2 ch (-- ch . sub . 2 --). sub . 4 chch . sub . 2 -- methyl114 t - butyl -- ch . sub . 2 ch . sub . 2 ( 1 , 2 - benzylene ) ch . sub . 2 -- -- 115 cyclohexyl - -- h n - octyl -- methyl116 t - butyl -- ch . sub . 2 ch . sub . 2 ch . sub . 2 ch (-- ch . sub . 2 --). sub . 4 ---- 117 t - butyl methyl 2 - cyclohexylethyl -- 118 t - butyl ethyl 2 - cyclohexylethyl -- 119 t - butyl n - 2 - cyclohexylethyl -- propyl120 t - butyl -- h 4 - methylcyclohexyl - -- methyl121 t - butyl methyl 2 - methylpropyl -- 122 t - butyl i - 2 - cyclohexylethyl -- propyl123 t - butyl n - 2 - methylpropyl -- propyl124 t - butyl -- h c ( ch . sub . 3 )═ chcoch . sub . 2 ch ( ch . sub . 3 ). sub . 2 -- 125 t - butyl -- ch . sub . 3 -- ch . sub . 2 --( 1 - methyl - -- cyclohexyl ) 126 t - butyl -- c . sub . 2 h . sub . 5 -- ch . sub . 2 --( 1 - methyl - -- cyclohexyl ) 127 t - butyl -- c . sub . 3 h . sub . 7 -- ch . sub . 2 --( 1 - methyl - -- cyclohexyl ) 128 t - butyl -- ch . sub . 32 - norbornyl -- 129 t - butyl -- c . sub . 2 h . sub . 52 - norbornyl -- 130 t - butyl -- c . sub . 3 h . sub . 72 - norbornyl -- 131 t - butyl -- ch . sub . 3 -- ch . sub . 2 -- c ( ch . sub . 3 ). sub . 3 -- 132 t - butyl -- c . sub . 2 h . sub . 5 -- ch . sub . 2 -- c ( ch . sub . 3 ). sub . 3 -- 133 t - butyl -- c . sub . 3 h . sub . 7 -- ch . sub . 2 -- c ( ch . sub . 3 ). sub . 3 -- 134 t - butyl -- h -- ch . sub . 2 -- c ( ch . sub . 3 ). sub . 3 -- 135 1 , 1 , 3 , 3 - --( ch . sub . 2 ). sub . 2 ch ( ch . sub . 3 )( ch . sub . 2 ). sub . 2 -- -- tetramethyl - butyl136 1 , 1 , 3 , 3 - -- ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 -- tetramethyl - butyl137 1 , 1 , 3 , 3 - -- h -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- tetramethyl - butyl138 t - butyl -- h2 - decalylhcl139 1 - methyl - 1 -- h -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- cyclohexyl - ethyl140 1 - methyl - -- ch . sub . 3n - c . sub . 6 h . sub . 13 -- 1 - cyclohexyl - ethyl141 1 - methyl - --( ch . sub . 2 ). sub . 2 ch ( ch . sub . 3 )( ch . sub . 2 ). sub . 2 -- -- 1 - cyclohexyl - ethyl142 1 - methyl - -- h -- c . sub . 6 h . sub . 11 -- 1 - cyclohexyl - ethyl143 t - butyl -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- 144 t - butyl -- h --( ch . sub . 2 ). sub . 2 och . sub . 3 -- 145 t - c . sub . 4 h . sub . 9 -- h -- ch . sub . 2 --( 2 - thf ) -- 146 t - butyl -- h -- ch . sub . 2 ch ( och . sub . 3 ). sub . 2 -- 147 t - butyl --( ch . sub . 2 ). sub . 2 och . sub . 3 --( ch . sub . 2 ). sub . 2 och . sub . 3 -- 148 t - butyl -- ch . sub . 3 -- ch . sub . 2 ch ( och . sub . 3 ). sub . 2 -- 149 t - butyl -- ch . sub . 3 -- ch . sub . 2 - 2 -( 1 , 3 - -- dioxolanyl ) 150 t - butyl -- ch . sub . 3 --( ch . sub . 2 ). sub . 2 och . sub . 3 -- 151 t - butyl -- ch . sub . 3 -- ch . sub . 2 --( 2 - thf ) -- 152 t - butyl -- c . sub . 2 h . sub . 5 -- ch . sub . 2 --( 2 - thf ) -- 153 t - butyl -- h -- ch . sub . 2 ch ( oc . sub . 2 h . sub . 5 ). sub . 2 -- 154 t - butyl -- c . sub . 2 h . sub . 5 -- ch . sub . 2 ch ( och . sub . 3 ). sub . 2 -- 155 t - butyl -- ch . sub . 3 -- ch . sub . 2 ch ( oc . sub . 2 h . sub . 5 ). sub . 2 -- 156 t - butyl -- c . sub . 2 h . sub . 5 -- ch . sub . 2 ch ( oc . sub . 2 h . sub . 5 ). sub . 2 -- 157 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - hcl cyclohexyl ) 158 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - hbr cyclohexyl ) 159 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - h . sub . 3 bo . sub . 3 cyclohexyl ) 160 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - 1 / 2 hooc -- cooh cyclohexyl ) 161 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - ch . sub . 3 cooh cyclohexyl ) 162 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - cf . sub . 3 cooh cyclohexyl ) 163 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - c . sub . 3 h . sub . 7 cooh cyclohexyl ) 164 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - c . sub . 5 h . sub . 11 cooh cyclohexyl ) 165 t - butyl -- h ch . sub . 2 --( 1 - methyl - c . sub . 11 h . sub . 23 cooh cyclohexyl ) 166 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - c . sub . 15 h . sub . 31 cooh cyclohexyl ) 167 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - c . sub . 6 h . sub . 5 b ( oh ). sub . 2 cyclohexyl ) 168 t - butyl -- h -- ch . sub . 2 --( 1 - methyl - saccharin cyclohexyl ) 169 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 hcl170 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 hbr171 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 h . sub . 3 bo . sub . 3172 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 1 / 2 hooc -- cooh173 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 ch . sub . 3 cooh174 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 cf . sub . 3 cooh175 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 c . sub . 3 h . sub . 7 cooh176 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 c . sub . 5 h . sub . 11 cooh177 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 c . sub . 11 h . sub . 23 cooh178 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 c . sub . 15 h . sub . 31 cooh179 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 c . sub . 6 h . sub . 5 b ( oh ). sub . 2180 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 saccharin__________________________________________________________________________ the compounds of formula i , wherein n represents 1 , 2 or 3 , are obtained from the corresponding compounds of formula iib , wherein n is 0 , 1 or 2 , respectively , using procedures analogous to example 1 ( vii ). the resulting compounds are given below in tables ib to id : table ib______________________________________formula i ( n = 1 ) example r . sub . 1 r . sub . 2 r . sub . 3 acid______________________________________181 t - butyl -- h -- h -- 182 t - butyl -- h -- c . sub . 6 h . sub . 11 -- 183 t - butyl -- hn - c . sub . 8 h . sub . 17 -- 184 t - butyl -- hn - c . sub . 6 h . sub . 13 -- 185 t - butyl -- h -- c . sub . 6 h . sub . 11 hcl186 t - butyl -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- ch . sub . 2 -- ch ( ch . sub . 3 ). sub . 2 -- 187 t - butyl -- ch . sub . 3 -- c . sub . 6 h . sub . 11 -- 188 t - butyl -- c . sub . 2 h . sub . 5 -- c . sub . 6 h . sub . 11 -- ______________________________________ table ic______________________________________formula i ( n = 2 ) example r . sub . 1 r . sub . 2 r . sub . 3 acid______________________________________189 t - butyl -- h -- c . sub . 6 h . sub . 11 -- 190 t - butyl -- h -- h hcl191 t - butyl -- ch . sub . 3 -- ch . sub . 3 -- 192 t - butyl -- h ( 3 - methyl )- -- cyclohexyl193 t - butyl -- h -- ch ( c . sub . 3 h . sub . 7 ) c . sub . 3 h . sub . 7 hcl194 t - butyl -- h -- ch ( ch . sub . 3 ) c . sub . 5 h . sub . 11 -- 195 t - butyl -- h -- c . sub . 7 h . sub . 13 -- 196 t - butyl -- c . sub . 4 h . sub . 9n - c . sub . 4 h . sub . 9 -- 197 t - butyl -- h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 -- 198 t - butyl -- h2 - decalyl -- 199 t - butyl -- ch . sub . 3 -- c . sub . 6 h . sub . 11 -- 200 t - butyl -- c . sub . 2 h . sub . 5 -- c . sub . 6 h . sub . 11 -- 201 t - butyl -- ch . sub . 3 -- ch ( ch . sub . 3 ) c . sub . 5 h . sub . 11 -- 202 t - butyl -- c . sub . 2 h . sub . 5 -- ch ( ch . sub . 3 ) c . sub . 5 h . sub . 11 -- 203 t - butyl --( ch . sub . 2 ). sub . 5 -- -- 204 t - butyl --( ch . sub . 2 ). sub . 2 -- o --( ch . sub . 2 ). sub . 2 -- -- 205 t - butyl -- h ( 4 - t - -- butyl )- cyclohexyl206 t - butyl -- h ( 4 - methyl )- -- cyclohexyl207 t - butyl -- h ( 2 - methyl )- -- cyclohexyl208 t - butyl -- h -- c . sub . 5 h . sub . 9 -- 209 t - butyl -- h --( ch . sub . 2 )- 2 - thf -- 210 t - butyl -- ch . sub . 3 -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 -- 211 t - butyl -- c . sub . 2 h . sub . 5 -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 -- 212 t - butyl -- c . sub . 3 h . sub . 7 -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 -- ______________________________________ table id______________________________________formula i ( n = 3 ) example r . sub . 1 r . sub . 2 r . sub . 3 acid______________________________________213 t - butyl h h -- 214 t - butyl h -- ch ( ch . sub . 3 ) c . sub . 5 h . sub . 11 -- 215 t - butyl h -- ch ( c . sub . 2 h . sub . 5 ) c . sub . 4 h . sub . 9 -- 216 t - butyl h -- ch ( c . sub . 3 h . sub . 7 ) c . sub . 3 h . sub . 7 -- 217 t - butyl h -- c . sub . 6 h . sub . 11 -- 218 t - butyl h -- c . sub . 7 h . sub . 13 -- 219 t - butyl --( ch . sub . 2 ). sub . 2 -- o --( ch . sub . 2 ). sub . 2 -- -- 220 t - butyl --( ch . sub . 2 ). sub . 5 -- -- 221 t - butyl --( ch . sub . 2 ). sub . 2 ch ( ch . sub . 3 )( ch . sub . 2 ). sub . 2 -- -- 222 t - butyl -- ch . sub . 2 ch ( ch . sub . 3 ) ch . sub . 2 ch ( ch . sub . 3 )-- -- 223 t - butyl -- ch . sub . 2 ch ( ch . sub . 3 )-- o -- ch ( ch . sub . 3 ) ch . sub . 2 -- -- ______________________________________ thf means tetrahydrofurfuryl , acid means that the compound is an ammonium salt of the denoted acid . all other alkyl groups are straight chains unless otherwise designated as branched chains . c 6 h 5 means phenyl , c 7 h 13 means cycloheptyl , c 6 h 11 means cyclohexyl , c 5 h 9 means cyclopentyl and c 3 h 5 means cyclopropyl . physical data for the above compounds are set out in tables ii , iii and iv . table ii______________________________________melting pointexample no . melting point ° c . ! ______________________________________1 1283 67 - 694 70 - 725 5012 53 - 57______________________________________ table iv______________________________________molecular weight ( determined by mass spectrometry ) exampleno . calculated found______________________________________6 305 3057 305 3058 265 2659 305 30510 277 27711 305 305______________________________________ test compounds are dissolved in acetone and diluted with deionized water ( 95 parts water to 5 parts acetone ) containing 0 . 05 % tween 20 ®, a polyoxyethylene sorbitan monolaurate surfactant manufactured by atlas chemical industries , to give a concentration of 200 ppm . the plants are sprayed with the test solutions , dried and inoculated with fungi later the same day . when disease symptom development is optimal , the plants are rated for disease control according to the rating scale shown below . each test contains inoculated treated plants , inoculated untreated plants and a inoculated plants treated with reference fungicides . the data obtained are shown in table v . ______________________________________rating scalerating range % control______________________________________0 01 1 - 142 15 - 293 30 - 444 45 - 595 60 - 746 75 - 897 90 - 958 96 - 999 100t no evaluation possible______________________________________targetssymbol disease pathogen______________________________________as apple scab venturia inaequalisgdm grape downy mildew plasmopara viticolapb pepper botrytis botrytis cinerearb rice blast pyricularia grisea f . sp . oryzaesbc sugar beet cercospora cercospora beticolateb tomato early blight alternaria solaniwpm wheat powdery mildew erysiphe graminis f . sp . triticiwsn wheat septoria nodorum septoria nodorum blotch______________________________________ table v______________________________________example as gdm pb rb sbc teb wpm wsn______________________________________1 6 9 8 0 6 0 7 72 8 8 9 0 4 0 8 03 8 5 9 0 6 8 8 84 0 0 9 0 7 0 9 75 6 5 9 0 7 0 8 46 5 4 7 4 7 3 7 67 4 3 7 0 8 4 7 78 8 0 6 0 6 0 5 49 8 2 8 0 4 0 7 610 8 5 6 0 6 2 6 711 7 6 8 0 5 5 6 612 7 0 7 0 0 0 5 0______________________________________ test compounds are dissolved in acetone then diluted with deionize water ( 9 parts water : 1 part acetone ), and dispersed into cell well plates containing a suspension of ground fungal mycelium in a nutrient broth resulting in a final concentration of 25 ppm of the test compound . assay plates are incubated for 3 - 7 days at 22 ° c . growth inhibition is measured visually and is rated using the following scale : ______________________________________ rating % inhibition______________________________________ 0 0 1 1 - 29 3 30 - 59 5 60 - 89 7 90 - 99 9 100______________________________________ untreated controls , solvent blanks and reference fungicide are included in each test . ______________________________________symbol pathogen______________________________________fus oxc fusarium oxysporium f . sp . cucumerinumpsdc he pseudocercosporella herpotrichoidesptyh ul pythium ultimumrhiz so rhizoctonia solani______________________________________ fus psdc pyth rhizexample oxc he ul so______________________________________1 0 7 7 92 0 9 9 73 0 0 1 04 0 0 0 05 0 0 0 06 0 7 7 97 0 7 7 98 0 7 7 99 0 7 7 910 0 9 9 911 0 9 0 912 0 9 0 9______________________________________
new antimicrobial spirocarbocyclic compounds are described , having the general formula i , ## str1 ## or an acid - addition salt thereof , in which r 1 represents an optionally substituted alkyl , cycloalkyl , cycloalkylalkyl , alkoxy , cycloalkoxy , alkoxyalkyl , aralkyl group r 2 and r 3 each independently represent hydrogen or an optionally substituted alkyl , alkenyl , alkynyl , cycloalkyl , cycloalkylalkyl , bicycloalkyl , tricycloalkyl , alkoxyalkyl , aralkyl , aryl or haloaralkyl , a 4 - to 6 - membered heterocyclyl , tetrahydrofuryl or dioxolanyl group , or r 2 and r 3 , together represents an optionally substituted , saturated or unsaturated chain which may optionally contain one or more oxygen atoms and which may optionally be aryl - or cycloalkyl - fused , and n represents zero or an integer from 1 to 3 . the invention further relates to the preparation of the above spirocarbocyclic compounds , intermediates prepared during the synthesis of these compounds , compositions containing the compounds and their use as fungicides in the control of phytopathogenic fungi .