One-Pot Synthesis of Functionalized Benzo[<i>b</i>]thiophenes and Their Hetero-Fused Analogues via Intramolecular Copper-Catalyzed S-Arylation of In Situ Generated Enethiolates
作者:Anand Acharya、S. Vijay Kumar、B. Saraiah、H. Ila
DOI:10.1021/acs.joc.5b00032
日期:2015.3.6
An efficient one-pot synthesis of highly functionalized multisubstituted benzo[b]thiophenes and their hetero-fused analogues, such as thieno[2,3-b]thiophenes, indolo[2,3-b]thiophenes, and pyrazolo[3,2-c]thiophenes, has been reported. The overall strategy involves sequential base-mediated condensation of 2-bromohet(aryl)acetonitrile precursors with (het)aryl/alkyl dithioesters or other thiocarbonyl
高效一锅合成高官能度的多取代苯并[ b ]噻吩及其杂合类似物,如噻吩并[2,3- b ]噻吩,吲哚并[2,3- b ]噻吩和吡唑并[3,2] - ç ]噻吩,已有报道。总体策略涉及2-溴己基(芳基)乙腈前体与(杂)芳基/烷基二硫代酯或其他硫代羰基化合物如三硫代碳酸二甲酯,S-甲基黄原酸酯,N-咪唑基二硫代甲基酯,N-烷基二硫代氨基甲酸酯和苯基异硫氰酸酯,然后分子内铜催化的原位生成的烯硫醇酯的芳硫基化,以高收率提供了各种2-官能化的3-氰基苯并[ b ]-和/或杂稠噻吩。