Synthesis of novel β-aryl-β-(methylthio)acroleins via Vilsmeier–Haack protocol as potential 1,3-dielectrophilic three-carbon building blocks
作者:G. Byre Gowda、T.P. Charanraj、C.S. Pradeepa Kumara、N. Ramesh、S.P. Thomas、M.P. Sadashiva、H. Junjappa
DOI:10.1016/j.tetlet.2014.06.065
日期:2014.8
A new general route for the synthesis of novel β-aryl-β-(methylthio)acroleins, a class of stable potential 1,3-dielectrophilic synthons, has been reported. The overall protocol involves treatment of either β-chloroacroleins or their precursor iminium salts (generated in situ from the corresponding active methylene ketones under Vilsmeier–Haack reaction conditions) with S,S-dimethyldithiocarbonates
已经报道了合成新型β-芳基-β-(甲硫基)丙烯醛的一类新的一般路线,所述β-芳基-β-(甲硫基)丙烯醛是一类稳定的潜在的1,3-二亲电子合成子。整个方案包括用一锅中的S,S-二甲基二硫代碳酸酯(DDC)/ KOH水溶液处理β-氯丙烯醛或其前体亚胺盐(在Vilsmeier-Haack反应条件下由相应的活性亚甲基酮原位生成)或两步过程。二甲基二硫代碳酸二甲酯(DDC)/ 30%的KOH水溶液已被证明是甲基硫代硫酸根阴离子的极好来源。