A novel Mannich type condensation between the monomethyl ester of acetonedicarboxylic acid, methylamine hydrochloride, and hydrolyzed dimethoxydihydrofuran gave 6- or 7- functionalized β-keto ester tropanes 12 - 15. Further elaboration afforded a series of 6- or 7- hydroxy and 6- or 7- methoxy 2β-methoxycarbonyl-3-aryltropanes.
丙酮二
羧酸的单甲酯,
甲胺盐酸盐和
水解的二甲氧基二氢
呋喃之间的新型曼尼希式缩合反应得到6或7-官能化的β-
酮酯tropanes 12-15。进一步加工得到一系列6-或-7-羟基和6-或7-甲氧基2β-甲氧基羰基-3-芳基托烷。