Perfect Stereochemical Control in the Synthesis of syn-α-Methyl-β-hydroxy Thioesters by Asymmetric Aldol Reaction of Silyl Enol Ethers with Aldehydes

Abstract
Perfect stereochemical control in the synthesis of syn-α-methyl-β-hydroxy thioesters are achieved by the asymmetric aldol reaction between silyl enol ether of S-ethyl propanethioate and aldehydes by the use of a chiral promoter consisted of chiral diamine coordinated tin(II) triflate and tributyltin fluoride.