Formal Asymmetric Synthesis
of (-)-Aphanorphine via Ring-Closing Metathesis
Reaction
作者:Zhong Li、Hongbin Zhai、Xiaobao Yang、Bin Cheng
DOI:10.1055/s-0028-1083498
日期:——
We have developed an asymmetric route to (-)-aphanorphine from O-Me-d-tyrosine methyl ester hydrochloride salt, available from d-tyrosine in four steps. The tricyclic framework of (-)-aphanorphine was assembled stereoselectively by intramolecular Friedel-Crafts reaction of the corresponding bicyclic precursor, which was in turn generated via ring-closing metathesis reaction.
我们开发了一条从 O-甲基-d-酪氨酸甲酯盐酸盐制备 (-)- 阿朴吗啡的不对称路线,该路线可通过四个步骤从 d-酪氨酸中获得。(-)-aphanorphine 的三环框架是通过相应双环前体的分子内 Friedel-Crafts 反应立体选择性地组装起来的,而双环前体又是通过闭环偏合成反应生成的。