Catalytic Use of a Soluble Organoindium(III) Species for Allylation and Crotylation of Ketones with Boronates
作者:Miyuki Yamaguchi、Naohide Morita、Uwe Schneider、Shū Kobayashi
DOI:10.1002/adsc.201000097
日期:——
The unprecedented use of a soluble organoindium species, indium(III) hexamethyldisilazide [In(III)(hmds)3], for catalytic carboncarbon bond formations between ketones and boronates, is reported. Various functionalized tertiary homoallyl alcohols were generated easily in high yields. Remarkably, free hydroxy and primary amine functionalities proved to be tolerated. A rate acceleration and markedly
前所未有的使用可溶性有机铟物种,铟(III)六甲基二硅的[在式(III)(HMDS)3 ]中,催化碳酮和硼酸酯之间的碳键的形成被报告。容易以高收率产生各种官能化的叔均烯丙基醇。显着地,证明了游离羟基和伯胺官能团是可以容忍的。在甲醇存在下,观察到速率加速和非对映选择性显着提高。基于初步的NMR实验和与α-取代的硼酸酯的α-选择性,我们假设反应性烯丙基(III)物种是通过催化硼-铟超金属化反应原位生成的。