参考标题:Synthesis Of Saponins With Cholestanol, Cholesterol, And Friedelanol As Aglycones 作者:Jörg Schimmel,M. Inês Passos Eleutério,Gerd Ritter,Richard R. Schmidt |发布日期:2006.4 摘要:Residue To Cholesterol And Then Galactosylation Could Be Developed. Total Deprotection Of 18 Or Regioselective Introduction Of A Sulfate Group And Of A Dodecylcarbamoyl Residue At 6A-O Furnished Saponins 34, 36, And 38, Respectively. Hydrogenation Of Cholesteryl Disaccharide 23 Led Directly To A 3A-O-Unprotected Cholestanyl Disaccharide 39. β-Selective Xylosylation And Transformation Of The Liberated