TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE (TRIMETHYLSILYL TRIFLATE) AS AN EXCELLENT GLYCOSIDATION REAGENT FOR ANTHRACYCLINE SYNTHESIS. SIMPLE AND EFFICIENT SYNTHESIS OF OPTICALLY PURE 4-DEMETHOXYDAUNORUBICIN

Abstract The title reagent was found to effect the glycosidation of (+)-4-demethoxyanthracyclinones with N-trifluoroacetyl-1,4-di-O-p-nitrobenzoyl-l-daunosamine, giving the ot-glycosides in 99% yields. Sequential deprotections of the glycoside readily afforded optically pure (+)-4-demethoxydaunorubicin.