Iridium-Catalyzed, Substrate-Directed C–H Borylation Reactions of Benzylic Amines
作者:Andrew J. Roering、Lillian V. A. Hale、Phillip A. Squier、Marissa A. Ringgold、Emily R. Wiederspan、Timothy B. Clark
DOI:10.1021/ol301635x
日期:2012.7.6
The iridium-catalyzedarene C–H borylation reaction of benzylic amines has been developed, which inverts the typical steric-controlled product distribution to provide ortho-substituted boronate esters. Picolylamine was found to be an ideal ligand to replace 4,4′-di-tert-butylbipyridine to induce the directing effect. Preliminary experiments are consistent with a mechanism involving dissociation of