Synthesis of three oligosaccharides that form part of the complex type of carbohydrate moiety of glycoproteins
作者:Jan Arnarp、Martin Haraldsson、Jörgen Lönngren
DOI:10.1016/s0008-6215(00)80676-x
日期:1981.11
Silver trifluoromethanesulfonate-promoted condensation of 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl bromide with benzyl 3,6-di-O-benzyl-alpha-D-mannopyranoside and benzyl 3,4-di-O-benzyl-alpha-D-mannopyranoside gave the protected 2,4- and 2,6-linked trisaccharides in yields of 54 and 32%, respectively. After exchanging the 2-deoxy-2-phthalimido groups for 2-acetamido-2-deoxy groups
三氟甲磺酸银促进的3,4,6-三-O-乙酰基-2-脱氧-2-邻苯二甲酰亚胺-β-D-吡喃葡萄糖基溴化物与3,6-二-O-苄基-α-D-甘露吡喃糖苷和苄基3,4-二-O-苄基-α-D-甘露吡喃糖苷以54%和32%的产率得到被保护的2,4-和2,6-连接的三糖。将2-deoxy-2-phthalimido基团换成2-acetamido-2-deoxy基团并进行脱保护后,三糖2,4-di-O-(2-deoxy-beta-D-吡喃葡萄糖基)-D-甘露糖得到2,6-二-O-(2-乙酰胺基-2-脱氧β-D-吡喃葡萄糖基)-D-甘露糖。3,6-二-O-乙酰基-2-脱氧-2-邻苯二甲酰亚胺-4-O-(2,3,4,6-四-O-乙酰基-β-D-吡喃半乳糖基)-β-D的类似缩合-吡喃葡萄糖基溴化物与苄基3,4-二-O-苄基-α-D-甘露吡喃糖苷一起以52%的收率得到五糖衍生物。