Intermolecular Hydroacylation: High Activity Rhodium Catalysts Containing Small-Bite-Angle Diphosphine Ligands
作者:Adrian B. Chaplin、Joel F. Hooper、Andrew S. Weller、Michael C. Willis
DOI:10.1021/ja211649a
日期:2012.3.14
rhodium complexes containing methylene bridged diphosphine ligands, viz. [Rh(C(6)H(5)F)(R(2)PCH(2)PR'(2))][BAr(F)(4)] (R, R' = (t)Bu or Cy; Ar(F) = C(6)H(3)-3,5-(CF(3))(2)), are shown to be practical and very efficient precatalysts for the intermolecularhydroacylation of a wide variety of unactivated alkenes and alkynes with β-S-substitutedaldehydes. Intermediate acyl hydride complexes [Rh((t)Bu(2)PCH
Well-Defined and Robust Rhodium Catalysts for the Hydroacylation of Terminal and Internal Alkenes
作者:Amparo Prades、Maitane Fernández、Sebastian D. Pike、Michael C. Willis、Andrew S. Weller
DOI:10.1002/anie.201503208
日期:2015.7.13
A Rh‐catalyst system based on the asymmetric ligand tBu2PCH2P(o‐C6H4OMe)2 is reported that allows for the hydroacylation of challenging internalalkenes with β‐substituted aldehydes. Mechanistic studies point to the stabilizing role of both excess alkene and the OMe‐group.
据报道,基于不对称配体t Bu 2 PCH 2 P( o -C 6 H 4 OMe) 2的 Rh 催化剂系统可以用 β 取代醛对具有挑战性的内烯烃进行加氢酰化。机理研究指出了过量烯烃和 OMe 基团的稳定作用。