Base catalyzed reaction of 1,4-dithiane-2,5-diol with α-oxoketene dithioacetals: a new general method for the synthesis of 2-methylthio-3-aroyl/heteroaroyl thiophenes
作者:C.S. Pradeepa Kumara、G. Byre Gowda、K.S. Vinay Kumar、N. Ramesh、M.P. Sadashiva、H. Junjappa
DOI:10.1016/j.tetlet.2016.08.033
日期:2016.9
The α-oxoketene dithioacetals and 1,4-dithiane-2,5-diol a dimer of mercapto acetaldehyde, react in the presence of anhydrous potassium carbonate in boiling ethanol to yield the corresponding 2-(methylthio)-3-aroyl/heteroaroyl thiophenes in 55–70% overall yields.
α-氧杂环丁烯二硫缩醛与巯基乙醛的二聚体1,4-二噻二-2,5-二醇在沸腾的乙醇中在无水碳酸钾存在下反应生成相应的2-(甲硫基)-3-芳酰基/杂芳酰基噻吩总产量的55-70%。