Efficient Heterogeneously Palladium-Catalysed Synthesis of Stilbenes and Bibenzyls
作者:Giuseppe Cusati、Anja Wedig、Laurent Djakovitch
DOI:10.2174/157017809787003043
日期:2009.1.1
An alternative heterogeneously palladium catalysed procedure for the synthesis of functional stilbenes and bibenzyls is reported. Starting from aryl bromides and using simple commercially available Pd/C catalyst at a low catalytic rate (1 mol%), stilbenes are obtained with 30-100% GC-yields and bibenzyls are produced in a one-pot fashion with 27-100% GC-yields. The procedure showed, however, some limitations when applied to strongly deactivated aryl bromides that could be in some extent overcome by using corresponding iodo derivatives.
报道了一种替代的异质钯催化程序,用于合成功能性斯蒂尔本和二苯乙烯。该方法以芳基溴化物为起始材料,使用简单的商用Pd/C催化剂,在低催化剂用量(1 mol%)下,斯蒂尔本的GC产率在30-100%之间,二苯乙烯则以单锅法生产,GC产率为27-100%。然而,该方法在强去活化的芳基溴化物应用时显示出一些局限性,但通过使用相应的碘衍生物可以在某种程度上克服这些问题。