Mild Silver(I)-Mediated Regioselective Iodination and Bromination of Arylboronic Acids
作者:Raed M. Al-Zoubi、Dennis G. Hall
DOI:10.1021/ol100537x
日期:2010.6.4
A convenient and regioselective silver(I)-mediated electrophilic iodination and bromination reaction of arylboronic acids has been developed. The boronic acid does not require protection prior to the reaction, which can be performed on a multigram scale with moderate to excellent yields. A mild, simple, and effective method is disclosed to provide ortho-haloarylboronic acids that can be used as useful
Direct Amidation of Carboxylic Acids Catalyzed by <i>ortho</i>-Iodo Arylboronic Acids: Catalyst Optimization, Scope, and Preliminary Mechanistic Study Supporting a Peculiar Halogen Acceleration Effect
作者:Nicolas Gernigon、Raed M. Al-Zoubi、Dennis G. Hall
DOI:10.1021/jo3013258
日期:2012.10.5
synthetic products motivates the development of catalytic, direct amidation methods employing free carboxylic acids and amines that circumvent the need for stoichiometric activation or coupling reagents. ortho-Iodophenylboronic acid 4a has recently been shown to catalyze direct amidation reactions at room temperature in the presence of 4A molecularsieves as dehydrating agent. Herein, the arene core of ortho-iodoarylboronic