Preparation of New Nitrogen-Bridged Heterocycles. 19. Smooth Syntheses of Thieno[3,2-<i>a</i>]- and Thieno[2,3-<i>b</i>]indolizine Derivatives
作者:Akikazu Kakehi、Suketaka Ito、Tuneo Fujii、Yuichiro Morimoto、Shin-ichi Matsumoto、Morio Shiohara
DOI:10.1246/bcsj.62.119
日期:1989.1
title compounds, thieno[3,2-a]- and thieno[2,3-b]indolizine derivatives were obtained in fairly good yields. The cyclization modes observed in these transformation reactions were in accord with those expected by the molecular orbital calculations using some model compounds and by the stereochemical consideration of starting indolizines. The alkylations of 3-hydroxythieno[3,2-a]- and 3-hydroxythieno[2
研究了在几种碱性条件下在 1- 和 3- 位具有酰基和/或氰基的 2-(乙氧基羰基甲硫基) 茚茚的反应,并得到了标题化合物噻吩并[3,2-a]-和噻吩并[2] ,3-b] 吲哚嗪衍生物以相当好的产率获得。在这些转化反应中观察到的环化模式与使用一些模型化合物的分子轨道计算和起始吲哚嗪的立体化学考虑所预期的一致。还研究了 3-羟基噻吩并 [3,2-a]- 和 3-羟基噻吩并 [2,3-b] indolizine 的烷基化,并以良好的产率形成了相应的 O-和 C-烷基化杂环。