Synthesis of Sterically Hindered Biaryls by Zr-Mediated Co-cyclotrimerization of Alkynes
作者:Lenka Dufková、Martin Kotorax、Ivana Císařová
DOI:10.1002/ejoc.200400881
日期:2005.6
arylpropynoates in the presence of stoichiometric amounts of CuCl or NiBr2(PPh3)2 represents a novel approach to the synthesis of biaryls, formed in good yields. The CuCl-mediated reaction proceeded through two reaction mechanisms, also affording Dewar benzenes together with the corresponding biaryls. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
在化学计量量的 CuCl 或 NiBr2(PPh3)2 存在下,用邻位取代的芳基丙酸酯处理氧化锆环戊二烯代表了一种合成联芳基的新方法,以良好的产率形成。CuCl 介导的反应通过两种反应机制进行,同时生成杜瓦苯和相应的联芳基化合物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)