Stereoselective O-glycosylation reactions using glycosyl donors with diphenylphosphinate and propane-1,3-diyl phosphate leaving groups
作者:Hariprasad Vankayalapati、Gurdial Singh、Isabelle Tranoy
DOI:10.1016/s0957-4166(01)00227-0
日期:2001.6
Glycosyl donors having a diphenylphosphinate and a propane-1,3-diyl phosphate leaving group were easily prepared by the addition of the anomeric hydroxyl group of 2,3,4,6-tetra-O-benzyl-α,β-d-glucopyranose to diphenylphosphinic and propane-1,3-diyldioxyphosphoryl chlorides. These glycosyl donors were selectively glycosylated with a number of primary and secondary oxygen nucleophiles in the presence
通过添加2,3,4,6-四-O-苄基-α,β-d-吡喃葡萄糖的异头羟基可以轻松制备具有二苯基次膦酸酯和丙烷1,3-二苯基磷酸酯离去基团的糖基供体生成二苯基次膦酸和丙烷1,,3-二基二氧基磷酰氯。在三甲基甲硅烷基三氟甲磺酸酯(TMSOTf)存在下,这些糖基供体被许多伯和仲氧亲核试剂选择性糖基化。磷酸1,3-二烷基酯的使用导致β- O-连接的糖苷的立体选择性形成。