Calcium-Catalyzed Hydroarylation of Alkenes at Room Temperature
作者:Meike Niggemann、Nicola Bisek
DOI:10.1002/chem.201001375
日期:——
trisubstituted styrene derivatives were reacted to give the desired diarylalkanes within less than an hour at roomtemperature in the presence of 2.5 mol % of Ca(NTf2)2/Bu4NPF6 (see scheme). Additionally, the highly reactive calcium catalyst was successfully applied for the hydroarylation of dienes and even trisubstituted olefins.
钙催化剂的发展:在室温下,在2.5 mol%Ca(NTf 2)2存在下,在不到一小时的时间内,使各种贫电子,富电子和三取代的苯乙烯衍生物反应生成所需的二芳基烷烃/ Bu 4 NPF 6(请参阅方案)。另外,高反应性钙催化剂已成功地用于二烯甚至三取代烯烃的加氢芳基化反应。
Graphene-Catalyzed Direct Friedel–Crafts Alkylation Reactions: Mechanism, Selectivity, and Synthetic Utility
Transition-metal-catalyzed alkylation reactions of arenes have become a central transformation in organic synthesis. Herein, we report the first general strategy for alkylation of arenes with styrenes and alcohols catalyzed by carbon-based materials, exploiting the unique property of graphenes to produce valuable diarylalkane products in high yields and excellent regioselectivity. The protocol is characterized
芳烃的过渡金属催化烷基化反应已成为有机合成的核心转化。在此,我们报告了第一个由碳基材料催化的芳烃与苯乙烯和醇类烷基化的一般策略,利用石墨烯的独特性质以高产率和优异的区域选择性生产有价值的二芳基烷烃产品。该协议的特点是广泛的底物范围和出色的官能团耐受性。值得注意的是,该过程构成了石墨烯的第一个普遍应用,以利用锚定在 GO 表面上的极性官能团促进直接 CC 键的形成,从而为使用良性且易于获得的石墨烯材料进行一系列官能团烷基化打开了大门。