Glycosylation of 2′-carboxybenzyl (CB) 2,3,4,6-tetra-O-benzyl-α-d-mannopyranoside (3), CB 2,3,4,6-tetra-O-benzyl-β-d-glucopyranoside (4), and CB 2,3-di-O-benzyl-4,6-O-benzylidene-β-d-glucopyranoside (5) as glycosyl donors with various glycosyl acceptors provided corresponding disaccharides in high yields. The present CB glycoside methodology was successfully applied to the efficient construction of the tetrasaccharide 41.
2′-羧基苄基(CB)2,3,4,6-四-O-苄基-α-d-甘露
吡喃糖苷(3)、CB 2,3,4,6-四-O-苄基-β-d-葡萄
吡喃糖苷(4)和CB 2,3-二-O-苄基-4,6-O-苄叉-β-d-葡萄
吡喃糖苷(5)作为糖基供体与各种糖基受体反应,以高产率提供了相应的二糖。目前的CB糖苷方法学成功应用于高效构建四糖41。