Selective Palladium-Catalysedipso Arylation of α,α-Disubstituted Benzo[b]thien-2-ylmethanols with Aryl Bromides using PCy3 as Ligand
作者:A. Beatrix Bíró、András Kotschy
DOI:10.1002/ejoc.200600929
日期:2007.3
α,α-Diphenylbenzo[b]thien-2-ylmethanol was treated with a series of aryl bromides in the presence of palladium(II) acetate and tricyclohexylphosphane to give the appropriate 2-aryl-benzo[b]thiophenes in good to excellent yield with concomitant formation of benzophenone. The reaction wassuccessfully extended to α,α-diphenylbenzo[b]thien-3-ylmethanol, although in certain cases the transformation was
α,α-二苯基苯并[b]噻吩-2-基甲醇在乙酸钯(II)和三环己基膦存在下用一系列芳基溴化物处理,得到合适的2-芳基-苯并[b]噻吩,收率良好至极好伴随着二苯甲酮的形成。该反应成功地扩展到 α,α-二苯基苯并[b]噻吩-3-基甲醇,尽管在某些情况下,由于同时进行的邻芳基化而使转化有偏差。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)