作者:Tamis Darbre、Cornelius Nossbaumer、Hans-J�rg Borschberg
DOI:10.1002/hlca.19840670417
日期:1984.6.20
2-(3-indolyl)ethylamine (3) and (S)-(N)-(l-p-menthen-8-yl)-2-(3-indolyl)ethylideneamine (4). The latter has been transformed into (−)-hobartine (6) in 64% yield via a stereoselective biomimetic cyclization by treatment with HCOOH. This unambiguous synthesis establishes the hitherto unknown absolute configuration of (−)-hobartin (6). Several model cyclization reactions of N-substituted α-(terpen-8-yl)imine
一种获得光学纯的(S)-(1-对-薄荷-8-基胺)(12)的改进方法已导致在合成阿斯替林(7)的途中方便地合成了两种假设的生物遗传中间体,即(S)- (N)-(1-对-hen烯-8-基)-2-(3-吲哚基)乙胺(3)和(S)-(N)-(1-对-ment烯-8-基)-2-胺(3-吲哚基)亚乙基亚胺(4)。后者已通过64%的收率转化为(-)-hobartine(6)通过用HCOOH处理的立体选择性仿生环化。这种明确的合成建立了迄今未知的(-)-hobartin(6)的绝对构型。描述了产生不饱和3氮杂双环[3.3.1]壬烷化合物的N-取代的α-(萜烯-8-基)亚胺衍生物的几种模型环化反应。