Iron-Catalyzed Cross-Coupling Reactions of Arylmagnesium Reagents with Aryl Chlorides and Tosylates: Influence of Ligand Structural Parameters and Identification of a General N-Heterocyclic Carbene Ligand
作者:Wenqin Wu、Qiaoqiao Teng、Yi-Yuan Chua、Han Vinh Huynh、Hung A. Duong
DOI:10.1021/acs.organomet.7b00180
日期:2017.6.26
evaluation of N-heterocyclic carbene ligands in the iron-catalyzed cross-coupling reactions of arylchlorides and arylmagnesium reagents is performed. There is no clear correlation between the donor strength of the N-heterocyclic carbene and the reaction outcome. Instead, the highest yields of the desired biaryl product are obtained with sterically demanding ligands possessing large %Vbur values. Through
AbstractCyclometallated NHC palladium complexes prepared from palladium(II) acetate [Pd(OAc)2] and unsymmetrical 1,3‐diarylimidazolinium salts catalyzed the hydroxymethylation of (hetero)arylboronic acids using an excess amount of formalin to afford (hetero)arylmethanols in good to satisfactory yields.magnified image