STEREOSELECTIVE SYNTHESIS OF CIS-α,β-EPOXYKETONES VIA DIVALENT TIN ENOLATE
A convenient method for the stereoselective synthesis of cis-β-substituted-α,β-epoxyketone is established employing Sn(OTf)2 mediated cross aldol reaction between α-bromoketone and aldehyde followed by successive treatment of the adduct with KF-dicyclohexyl-18-crown-6.