Gold(III)-Catalyzed Decarboxylative C3-Benzylation of Indole-3-carboxylic Acids with Benzylic Alcohols in Water
作者:Hidemasa Hikawa、Fumiya Kotaki、Shoko Kikkawa、Isao Azumaya
DOI:10.1021/acs.joc.8b02947
日期:2019.2.15
the indole ring in the transition state. Furthermore, comparison of initial rates in H2O and in D2O reveals an observed kinetic solvent isotope effect (KSIE = 2.7). This simple protocol, which affords the desired products with CO2 and water as the coproducts, can be achieved under mild conditions without the need for base or other additives in water.
已经开发了金(III)催化的吲哚-3-羧酸与苯甲醇的脱羧偶联反应的策略。这种级联反应被设计为3-苄基吲哚的简单有效的合成途径,产率中等至优异(50-93%)。Hammett对原脱羧的研究给出了一个负ρ值,表明在过渡态吲哚环上会积累正电荷。此外,比较H 2 O和D 2 O中的初始速率可发现观察到的动力学溶剂同位素效应(KSIE = 2.7)。这个简单的协议,提供所需的产品与CO 2 和水作为副产物,可以在温和的条件下获得,而无需在水中添加碱或其他添加剂。