Deaminative Reductive Cross-Electrophile Couplings of Alkylpyridinium Salts and Aryl Bromides
作者:Jennie Liao、Corey H. Basch、Megan E. Hoerrner、Michael R. Talley、Brian P. Boscoe、Joseph W. Tucker、Michelle R. Garnsey、Mary P. Watson
DOI:10.1021/acs.orglett.9b01014
日期:2019.4.19
A nickel-catalyzed reductive cross-coupling of alkylpyridinium salts and aryl bromides has been developed using Mn as the reductant. Both primary and secondary alkylpyridinium salts can be used, and high functional group and heterocycle tolerance is observed, including for protic groups. Mechanistic studies indicate the formation of an alkyl radical, and controlling its fate was key to the success
Reductive Cross-Coupling of Nonaromatic, Heterocyclic Bromides with Aryl and Heteroaryl Bromides
作者:Gary A. Molander、Kaitlin M. Traister、Brian T. O’Neill
DOI:10.1021/jo500905m
日期:2014.6.20
Reductive cross-coupling allows the directC–Cbond formation between two organic halideswithout the need for preformation of an organometallic reagent. A method has been developed for the reductive cross-coupling of nonaromatic, heterocyclic bromides with aryl or heteroaryl bromides. The developed conditions use an air-stable Ni(II) source in the presence of a diamine ligand and a metal reductant