An efficient synthesis of 3-aryl-2-aryl(or methyl)sulfanylbenzo[b]thiophenes via cyclization of aryl 2-aryl(or methyl)sulfanylmethylsulfanylphenyl ketones
作者:Kazuhiro Kobayashi、Yuko Egara、Shuhei Fukamachi、Hisatoshi Konishi
DOI:10.1016/j.tet.2009.09.038
日期:2009.11
convenient method for the preparation of 2-aryl(or methyl)sulfanylbenzo[b]thiophenes has been developed. Thus, aryl 2-aryl(or methyl)sulfanylmethylsulfanylphenyl ketones, easily prepared from readily available aryl 2-sulfanylphenyl ketones or 2-chloro-5-nitrophenyl phenyl ketone, are treated with LDA in 1,2-dimethoxyethane (DME) to give 3-aryl-2-aryl(or methyl)sulfanylmethylsulfanyl-2,3-dihydrobenzo[b]thiophen-3-ols
已经开发了一种方便的制备2-芳基(或甲基)硫烷基苯并[ b ]噻吩的方法。因此,将易于由易得的芳基2-硫烷基苯基酮或2-氯-5-硝基苯基苯基酮制得的芳基2-芳基(或甲基)硫烷基甲基硫基苯基酮在1,2-二甲氧基乙烷(DME)中用LDA处理,得到3 -芳基-2-芳基(或甲基)硫烷基甲基硫基-2,3-二氢苯并[ b ]噻吩-3-醇,然后用亚硫酰氯脱水,得到3-芳基-2-芳基(或甲基)硫烷基苯并[ b]噻吩的总产量合理。