On Cardioactive Steroids. XVI. Stereoselective ?-Glycosylation of Digitoxose: The Synthesis of Digitoxin
作者:Karel Wiesner、Thomas Y. R. Tsai、Haolun Jin
DOI:10.1002/hlca.19850680203
日期:1985.3.27
Two methods for stereoselective β-glycosylation of digitoxose were developed. The first achieved stereocontrol by a 1,3-participation of a N-methylurethane group under acid catalysis. The second utilized mercuric-ion catalyzed cleavage of thioglycosides and a 1,3-participation of a p-methoxybenzoyl group in a neutral medium. The first highly stereoselective and quite efficient synthesis of digitoxin