Pd-catalyzed asymmetric allylation with a novel C 2 -symmetric bisphosphinite ligand: 3 R ,3′ R -bis(diphenylphosphinoxy)-6,6,6′,6′-tetramethyl-2 S ,2′ S -di-4 H -pyran
作者:Ruzhou Zhang、Libing Yu、Li Xu、Zhiqin Wang、Kuiling Ding
DOI:10.1016/s0040-4039(01)01624-0
日期:2001.10
A novel C-2-symmetric chiral bisphosphinite ligand, 3R,3'R-bis(diphenylphosphinoxy)-6,6,6',6'-tetramethyl-2S,2'S-di-4H-pyran, was synthesized from D-mannitol and examined for palladium-catalyzed asymmetric allylic substitution. Under the optimized conditions, the allylation product can be obtained in up to 91.2% ee. (C) 2001 Elsevier Science Ltd. All rights reserved.