Well-defined [Rh(NHC)(OH)] complexes enabling the conjugate addition of arylboronic acids to α,β-unsaturated ketones
作者:Byron J. Truscott、George C. Fortman、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1039/c1ob06112g
日期:——
The synthesis and catalytic activity of three well-defined monomeric rhodium(I) hydroxide complexes bearing N-heterocyclic carbene (NHC) ligands are reported. [Rh(cod)(ICy)(OH)] promoted the 1,4-addition of arylboronic acids to cyclic enones, with TONs and TOFs of 100,000 and 6,600 h−1, respectively, at 0.001 mol% catalyst loadings. Mechanistic studies permitted the isolation of a phenylrhodium intermediate
报道了三种带有N-杂环卡宾(NHC)配体的定义明确的单体铑铑(I)配合物的合成和催化活性。[Rh(cod)(ICy)(OH)]促进了芳基硼酸向环状烯酮的1,4-加成,在0.001 mol%的催化剂负载量下,TON和TOF分别为100,000和6,600 h -1。机理研究允许分离出苯基铑中间体。