Selective Kumada biaryl cross-coupling reaction enabled by an iron(iii) alkoxide–N-heterocyclic carbene catalyst system
作者:Yi-Yuan Chua、Hung A. Duong
DOI:10.1039/c4cc02930e
日期:——
A catalyst system comprising Fe2(OtBu)6 and an N-heterocyclic carbene ligand enables efficient syntheses of (hetero)biaryls from the reactions of aryl Grignard reagents with a diverse spectrum of (hetero)aryl chlorides. Amongst the alkoxide and amide counterions investigated, tert-butoxide was the most effective in inhibiting the homocoupling of arylmagnesiums.
Palladium Acetate Catalyzed Oxidative Aromatization of Methylenecyclopropanes
作者:Min Jiang、Yin Wei、Min Shi
DOI:10.1002/ejoc.201000299
日期:2010.6
Isopropenylbiaryl derivatives were produced in moderate to good yields at high temperature from the reaction of methylenecyclopropanes (MCPs) 1 in the presence of palladiumacetate under ambient atmosphere by tandem intramolecular C-H and C-C bond activation and aromatization through dehydrogenated rearrangement of MCPs 1. A plausible mechanism has been proposed on the basis of deuterium labeling and