Asymmetric synthesis of spirocyclic pyrrolidines and tetrahydrofurans by chiral aldol reactions and phenylthio migration
作者:Kelly Chibale、Stuart Warren
DOI:10.1016/0040-4039(91)80244-z
日期:1991.11
Highly enantioselective aldol reactions of the boron enolate of (S)-N-propionyl-4-(phenylmethyl)-2-oxazolidinone with α-phenylthio cycloalkanecarbaldehydes were achieved. Cyclisation of the chiral phenylthio sulphonamide and diols gave the title compounds in excellent yields and enantiomeric excess.