Coupling reactions of aryl bromides with 1-alkynols catalysed by a tetraphosphine/palladium catalyst
作者:Marie Feuerstein、Henri Doucet、Maurice Santelli
DOI:10.1016/j.tetlet.2003.12.128
日期:2004.2
cis. cis, cis-1, 2, 3,4-Tetrakis(diphenylphosphinomethyl)cyclopentane/[PdCl(C3H5)](2) system catalyses efficiently the coupling reactions of aryl halides with a variety of alkynols such as propargy] alcohol, but-1-yn-4-ol, pent-1-yn-5-ol or hex-1-yn-6-ol. The catalyst can be used at lowloading. Higher reaction rates were observed in the presence of but-1-yn-4-ol, pent-1-yn-5-ol or hex-1-yn-6-ol than with propargy] alcohol. The protection of the alcohol functions as an ether or a silyloxy group led generally to similar or better results than the reactions performed with the unprotected alcohols. (C) 2004 Elsevier Ltd. All rights reserved.