Synthesis of a Novel Heterocyclic System - Pyrimido[5,4:5,6]thiopyrano [2,3-b]indole
作者:Jurgis Sudzius、Sigitas Tumkevicius
DOI:10.2174/157017809789869492
日期:2009.10.1
An efficient protocol for the synthesis of pyrimido[5,4p:5,6]thiopyrano[2,3-b]indoles by the cyclocondensation of 1,3-dihydro-2H-indole-2-thione with 6-chloropyrimidine-5-carbaldehydes has been developed. 4-Chloro-2- methylthiopyrimido[5,4:5,6]thiopyrano[2,3-b]indole was found to undergo smooth nucleophilic substitution with various nucleophiles to give 4-substituted pyrimido[5,4:5,6]thiopyrano[2,3-b]indoles.
通过 1,3-二氢-2H-吲哚-2-硫酮与 6-氯嘧啶-5-羰基醛的环缩合,开发出了一种合成嘧啶并[5,4p:5,6]噻喃并[2,3-b]吲哚的高效方法。研究发现,4-氯-2-甲硫基嘧啶并[5,4:5,6]噻喃并[2,3-b]吲哚能与各种亲核物顺利发生亲核取代反应,生成 4-取代的嘧啶并[5,4:5,6]噻喃并[2,3-b]吲哚。