Application of the heck reaction for the synthesis of 1-alkoxyisoquinoline- 3-carboxylic acids esters
It has been shown that the cyclization of the methyl 2-(2,2,2-trifluoroacetylamino)acrylate arylation product using methyl 4,6-dichloro-2-iodobenzoate gives the corresponding 1-methoxyisoquinoline-3-carboxylic acid ester through loss of water rather than methanol. This feature of the condensation has been used for the synthesis of methyl 1-(tert-butoxycarbonylmethoxy)isoquinoline-3-carboxylate.