Synthesis of 3-Methoxyellipticine and Ellipticine by Friedel-Crafts Reaction of Indole-2,3-dicarboxylic Anhydride and Selective Demethylation
作者:Yasuyoshi Miki、Yoshiyuki Aoki、Yasuhiko Tsuzaki、Misako Umemoto、Hajime Hibino
DOI:10.3987/com-05-10522
日期:——
Reaction of 1-benzylindole-2,3-dicarboxylic anhydride with 2,4,6-trimethoxypyridine in the presence of a Lewis acid gave 1-benzyl-3-(2,4,6-trimethoxynicotinoyl)indole-2-carboxylic acid as the sole product in high yield, which could be changed to 1-benzyl-3-(2,4,6-trimethoxynicotinoyl)indole. 1-Benzyl-3-(2,4,6-trimethoxynicotinoyl)indole was converted to 3-methoxy-ellipticine and ellipticine by selective
在路易斯酸存在下,1-苄基吲哚-2,3-二羧酸酐与 2,4,6-三甲氧基吡啶反应得到 1-苄基-3-(2,4,6-三甲氧基烟酰基)吲哚-2-羧酸唯一高收率产物,可改为1-苄基-3-(2,4,6-三甲氧基烟酰基)吲哚。1-Benzyl-3-(2,4,6-trimethoxynicotinoyl)indole 通过甲氧基的选择性去甲基化和三氟甲磺酸化转化为 3-甲氧基玫瑰树碱和玫瑰树碱。