A Palladium-Catalyzed Carbonylation Approach to Acid Chloride Synthesis
作者:Jeffrey S. Quesnel、Bruce A. Arndtsen
DOI:10.1021/ja4098093
日期:2013.11.13
We describe a new approach to acid chloride synthesis via the palladium-catalyzed carbonylation of aryl iodides. The combination of sterically encumbered phosphines ((PBu3)-Bu-t) and CO coordination has been found to facilitate the rapid carbonylation of aryl iodides into acid chlorides via reductive elimination from ((Bu3P)-Bu-t)(CO)Pd(COAr)Cl. The formation of acid chlorides can also be exploited to perform traditional aminocarbonylation reactions under exceptionally mild conditions (ambient temperature and pressure), and with a range of weakly nucleophilic substrates.
Conjugate Addition of Organoboron Compounds to α,β-Unsaturated Ketones Catalyzed by Nickelacycles
作者:Kazuhiko Semba、Yoshiaki Nakao、Kotaro Nagase
DOI:10.1055/a-2150-2912
日期:2023.11
catalytic activity of nickelacycles in the conjugate addition of arylboronates to α,β-unsaturatedketones was investigated. Nickelacycles afforded β-arylated ketones in moderate to high yields, whereas an analogous palladacycle did not catalyze the reaction. Studies on the time course of the reaction confirmed that the nickelacycles act as active species in the conjugate addition reaction.