Using isovanillin and tyramine as the initial materials,racemic galanthamine was prepared in five steps including bromination,condensation and reduction,formylation, oxidation coupling and reduction.

• 以异香草醛和酪胺为主要原料,经溴化、缩合还原、甲酰化、氧化偶合及还原五步反应,合成了外消旋加兰他敏。