Diazo carbonyl derivatives of heterocycles. 2. Reaction of anhydrides of pyridine- and quinolinedicarboxylic acids with diazomethane
The reaction of anhydrides of cinchomeronic, quinolinic, and acridinic acids with diazomethane was studied. The reaction pathway that they have in common is acylation of diazomethane with opening of the anhydride ring, accompanied by the formation of the corresponding diazo ketones. It is shown that the nature of the heterocyclic part of the anhydride molecule has a substantial effect on the character of the parallel reactions.