Chemical Communications 2012-02-14

An efficient palladium-benzimidazolyl phosphine complex for the Suzuki-Miyaura coupling of aryl mesylates: facile ligand synthesis and metal complex characterization.

Kin Ho Chung, Chau Ming So, Shun Man Wong, Chi Him Luk, Zhongyuan Zhou, Chak Po Lau, Fuk Yee Kwong

文献索引：Chem. Commun. (Camb.) 48 , 1967, (2012)

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摘要

A new class of easily accessible hemilabile benzimidazolyl phosphine ligands has been developed. The ligand skeleton is prepared from commercially available and inexpensive o-phenylenediamine and 2-bromobenzoic acid. With catalyst loading down to 0.5 mol% palladium, excellent catalytic activity towards the Suzuki-Miyaura coupling of aryl mesylates is still observed. This represents the lowest catalyst loading achieved so far for this reaction in general. X-Ray crystallography shows that new ligand L2 is coordinated with Pd in a κ(2)-P,N fashion.This journal is © The Royal Society of Chemistry 2012