Cardiac glycosides: 5. Stereoselective syntheses of digitoxigenin α-D, β-D, α-L, and β-L-glucosides
作者:Hargovind Rathore、Toshihiro Hashimoto、Kikuo Igarashi、Haruo Nukaya、Dwight S. Fullerton
DOI:10.1016/s0040-4020(01)91342-0
日期:1985.1
As part of a continuing study of cardiac g1ycos1des,1,2 stereoselectivesyntheses of the four possible glucosides of digitoxigenin were developed via the thermodynamically produced tetra-O-benzyl-D- and L-glucosyl α-trichloroacetaimidates 2α and 11α, and the kinetically produced β-trichloroacetaimidates 2β and 11β. A 58%:19% isolated yield ratio of α-D and β-D benzyl protected glycosides 6 and 3 could