Asymmetric aldol reaction of 2-cyanopropionates catalyzed by a trans-chelating chiral diphosphine–rhodium(I) complex: highly enantioselective construction of quaternary chiral carbon centers at α-positions of nitriles
作者:Ryoichi Kuwano、Hiroshi Miyazaki、Yoshihiko Ito*
DOI:10.1016/s0022-328x(00)00049-8
日期:2000.5
The aldolreaction of 2-cyanopropionates with aldehydes proceeded under neutral conditions in the presence of a catalytic amount of the rhodium complex generated in situ from Rh(acac)(CO)2 and triphenylphosphine, to give the corresponding β-hydroxy-α-cyanocarboxylates bearing a quaternary chiral carbon center at the α-position of the cyano group. A high degree of asymmetric induction for the aldol reaction
Asymmetric aldol reaction of 2-cyanopropionates catalysed by trans-chelating chiral diphosphine ligand TRAP–rhodium(I) complex
作者:Ryoichi Kuwano
DOI:10.1039/a706662g
日期:——
trans-Chelating chiral diphosphine TRAP ligands bearing P-aromatic groups are effective for RhI-catalysed asymmetric aldol reaction of 2-cyanopropionates with an aldehyde to give the corresponding aldol adduct with up to 93% ee.