Studies of heterocyclic compounds. Part XIII. Pyrrolo[2,1-b]thiazole thioaldehydes: synthesis and spectral studies
作者:R. K. Mackie、S. McKenzie、D. H. Reid、R. G. Webster
DOI:10.1039/p19730000657
日期:——
Pyrrolo[2,1 -b]thiazole-5- and 7-thiocarbaldehydes, a class of stable heterocyclic thioaldehydes, have been synthesised by a modification of the Vilsmeier reaction. 6-Methyl- and 2,3,6-trimethylpyrrolo[2,1-b]thiazole-5-[2H]-thiocarbaldehyde have been obtained by using [2H7]dimethylformamide in the Vilsmeier reaction. 1H N.m.r. spectral data for the thioaldehydes in CDCl3 are recorded. Restricted rotation
吡咯并[2,1- b ]噻唑-5-和7-硫代甲醛,一类稳定的杂环硫代醛,通过对Vilsmeier反应的修饰而合成。通过在Vilsmeier反应中使用[ 2 H 7 ]二甲基甲酰胺,获得了6-甲基-和2,3,6-三甲基吡咯并[ 2,1 - b ]噻唑-5- [ 2 H]-硫代甲醛。记录CDCl 3中硫醛的1 H Nmr光谱数据。在6-甲基-,2,6-二甲基-和6,7-二甲基-吡咯并[2,1- b噻唑-5-硫代甲醛,以3-H和CHS信号随温度变化的形状为探针。(CD 3)2 SO中溶液的聚结温度在78–86°范围内。1 H核磁共振谱的数据表明,吡咯并[2,1 - b ]噻唑-5- thiocarbaldehydes在任一存在顺式-构型(6-甲基- ,2,6-二甲基,6,7-二甲基- ,和3-甲基-6-叔丁基),或在一个反-构型(3,6-二甲基-和2,3,6-三甲基),和在一个存在7 thioc