Methods for producing norgalanthamine, as well as isomers, salts and hydrates thereof

摘要

The invention relates to processes, which can be performed on an industrial scale, for the production of norgalanthamine, norgalanthamine derivatives and isomers thereof of general formula (A) as well as salts or hydrates thereof with general formula (B). As processes for the production of compounds with general formula (A) or (B), an oxidative demethylation and a catalytic demethylation of the corresponding galanthamine compounds are indicated.