DIRECT ENANTIOSELECTIVE SYNTHESIS OF SYN-1,3-DIOLS BY THE REACTION OF ALDEHYDES WITH ENOL SILYL ETHERS IN THE PRESENCE OF A CHIRAL BORANE COMPLEX - SUCCESSIVE ASYMMETRIC ALDOL REACTION AND ASYMMETRIC REDUCTION WITH ONE PROMOTER
A stoichiometric amount of the chiral borane 1 turned out to successively promote the asymmetric aldol reaction of aldehydes with enol silyl ethers and the following asymmetric reduction in one pot to afford syn-1,3-diols with high enantioselectivity.