PROCESS FOR THE PRODUCTION OF NORGALANTHAMINE, AND ISOMERS, SALTS AND HYDRATES THEREOF

摘要

The invention relates to industrial scale-executable methods for producing norgalanthamine, norgalanthamine derivatives and their isomers of general formula (A) as well as their salts or hydrates of general formula (B). An oxidative demethylation and a catalytic demethylation of the corresponding galanthamine compounds serve as methods for producing the compounds of gener al formula (A) or (B).