Studies on the chemistry of thienoanellated<i>O,N</i>- and<i>S,N</i>-containing heterocycles.<b>3</b>. Synthesis of tricyclic thieno[2,3-<i>b</i>][1,4]thiazines<i>via</i>nucleophilic substitution of activated precursors
作者:Thomas Erker
DOI:10.1002/jhet.5570300443
日期:1993.7
Starting from thieno[2,3][1,4-b]thiazine 1 new synthetic pathways to the tricyclic compounds 5, 12, 13, 14, 20 and the tetracyclic ring system 19 are described. Under mild reaction conditions some intermediates can be isolated. Reaction of 8 with several amines leads to the amidines 15–18.
从噻吩并[2,3] [1,4开始b ]噻嗪1种新合成途径的三环化合物5,12,13,14,20和四环系统19进行说明。在温和的反应条件下,可以分离出一些中间体。8与几种胺的反应生成15 15–18。