Synthesis of Polysubstituted Alkenes by Heck Vinylation or Suzuki Cross-Coupling Reactions in the Presence of a Tetraphosphane−Palladium Catalyst
作者:Florian Berthiol、Henri Doucet、Maurice Santelli
DOI:10.1002/ejoc.200390161
日期:2003.3
4-tetrakis[(diphenylphosphanyl)methyl]cyclopentane as a catalyst, a range of vinyl bromides undergo Suzuki cross-couplings with arylboronic acids in good yields. Furthermore, the catalyst can be used at low loadings, even for reactions of sterically hindered substrates. Mediated by this catalyst, stilbene and 1,1-diphenylethylene undergo Heck reactions with aryl halides to give triarylethylene derivatives
通过使用 [PdCl(C3H5)]2/cis,cis,cis-1,2,3,4-四[(二苯基膦基)甲基]环戊烷作为催化剂,一系列乙烯基溴与芳基硼进行 Suzuki 交叉偶联产率良好的酸。此外,该催化剂可以在低负载下使用,甚至用于空间位阻底物的反应。在该催化剂的介导下,二苯乙烯和 1,1-二苯基乙烯与芳基卤化物发生 Heck 反应,生成三芳基乙烯衍生物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)