作者:Zhiqiang Ma、Hanwei Hu、Wanting Xiong、Hongbin Zhai
DOI:10.1016/j.tet.2007.05.059
日期:2007.8
We describe the efficient formal syntheses of both natural (−)-aphanorphine and unnatural (+)-aphanorphine from the same commercially available amino acid, (2S,4R)-4-hydroxyproline. The tricyclic framework was constructed by intramolecular Friedel–Crafts reaction. (1R,4S)-1-Methyl-8-methoxy-3-(4-toluenesulfonyl)-2,3,4,5-tetrahydro-1,4-methano-3-benzazepine (8) was synthesized in six steps from sulfonamide
我们描述了天然(-)-Aphanorphine和非天然(+)-Aphanorphine的有效形式合成,它们来自同一市售氨基酸(2 S,4 R)-4-羟脯氨酸。三环骨架是通过分子内Friedel-Crafts反应构建的。(6 R)合成了(1 R,4 S)-1-甲基-8-甲氧基-3-(4-甲苯磺酰基)-2,3,4,5-四氢-1,4-甲氧基-3-苯并ze庚因(8)从磺胺3步; 从内酯10经七个步骤获得(-)-阿啡吗啡甲基醚24。在BF 3存在下,18的分子内醚化反应具有出色的立体选择性·OEt 2,它为一系列具有医学吸引力的杂环化合物铺平了有效的合成路线。