A synthetic study towards the PSA1 tetrasaccharide repeating unit
摘要:
A synthetic study to the protected tetrasaccharide repeating unit of zwitterionic polysaccharide PSA1 using 1-thio, 1-seleno and 1-hydroxyl functionalized donor glycosides is presented. The ABC trisaccharide part was successfully assembled using an iterative clehydrative glycosylation protocol. (c) 2007 Elsevier Ltd. All rights reserved.
Acylation of carbohydrates over Al2O3: preparation of partially and fully acylated carbohydrate derivatives and acetylated glycosyl chlorides
作者:Pallavi Tiwari、Anup Kumar Misra
DOI:10.1016/j.carres.2005.11.035
日期:2006.2
protocol does not require the addition of any base or activator. This methodology has been further extended to the selective acylation of carbohydrate diols and the one-pot preparation of acetylated glycosyl chlorides directfrom free reducingsugars. The yields obtained in most of the cases are excellent.