Selective preparation of non-symmetrically substituted divinylbenzenes by palladium-catalysed arylations of alkenes with bromobenzoic acid derivatives
作者:Alwyn Spencer
DOI:10.1016/0022-328x(84)80097-2
日期:1984.4
three bromobenzoyl chlorides react only as aroyl chlorides. Using two different alkenes a given non-symmetrically substituted divinylbenzene can be prepared by four different routes, allowing for an optimum choice of synthesis path. Substituent effects in the aromatic derivatives and the reactivity of the alkenes in arylation are the principal features to be taken into account. The reaction pathway can
钯与三种溴代苯甲酸或其酰氯的钯催化芳基化为制备非对称取代的二乙烯基苯衍生物提供了一种有效而选择性的方法。在乙酸钯和磷配体的存在下,除了2-溴苯甲酸外,游离酸以芳基溴化物的形式反应。如果单独使用乙酸钯作为催化剂,则所有三种溴苯甲酰氯仅作为芳酰氯反应。使用两种不同的烯烃,可以通过四种不同的途径制备给定的非对称取代的二乙烯基苯,从而可以最佳地选择合成途径。在芳族衍生物中的取代作用和芳基化中烯烃的反应性是要考虑的主要特征。