Base Metal Catalysts for Photochemical C–H Borylation That Utilize Metal–Metal Cooperativity
2013; American Chemical Society; Volume: 135; Issue: 46 Linguagem: Inglês
10.1021/ja408861p
ISSN1943-2984
AutoresThomas J. Mazzacano, Neal P. Mankad,
Tópico(s)Catalytic Cross-Coupling Reactions
ResumoHeterobimetallic Cu–Fe and Zn–Fe complexes catalyze C–H borylation, a transformation that previously required noble metal catalysts. The optimal catalyst, (IPr)Cu-FeCp(CO)2, exhibits efficient activity at 5 mol% loading under photochemical conditions, shows only minimal decrease in activity upon reuse, and is able to catalyze borylation of a variety of arene substrates. Stoichiometric reactivity studies are consistent with a proposed mechanism that exploits metal–metal cooperativity and showcases bimetallic versions of the classical organometallic processes, oxidative addition and reductive elimination.
Referência(s)