have been derived without stereochemical change from protoemetine (3) and corynantheine (14), respectively. These experiments constitute a chemical correlation of the indole and Ipecauanha groups of alkaloids. It is thus confirmed that emetine (1) and corynantheine (14) have the same absolute configuration. The biosynthetic aspects are discussed. Preliminary work involving lactams, e.g.(7), derived from
制备(–)-3,4-
二乙基环戊酮,并通过不涉及不对称中心的步骤将其转化为盐(25)和(27),其对映异构体是从原美美汀(3)和七氢
鸟嘌呤(14)衍生而来的,其立体
化学性质没有变化), 分别。这些实验构成了
生物碱的
吲哚和Ipecauanha基团的
化学相关性。因此证实了,依替米汀(1)和corynantheine(14)具有相同的绝对构型。讨论了
生物合成方面。简要描述了涉及衍生自苯并喹oli嗪的内酰胺,例如(7)的初步工作。