Synthesis of a Mannose Hexasaccharide Related to the Cell Wall Mannan of Candida dubliniensis and Trychophyton mentagrophytes
作者:Jianjun Zhang、Xiaomei Liang、Guanghui Zong、Naili Yu、Yanjun Xu、Daoquan Wang
DOI:10.1055/s-0029-1218719
日期:2010.5
synthesized from 4-methoxyphenyl α-d-mannopyranoside (6) in 11 steps in 26% total yield. The efficiency of the synthesis relies on the preparation of a trisaccharide acceptor 2 with three free hydroxy groups, which could be glycosylated with trichloroacetimidate 19 to provide the protected hexasaccharide 20 in one step. Compound 2 was obtained via sequential assembly from the building blocks, 2,6-di-O-allyloxycarbonyl-3
由4-甲氧基苯基α- d-甘露吡喃糖苷(6)精简合成了与假丝酵母和壁生Trychophyton mentagrophytes细胞壁多糖相关的2,6-支甘露糖六糖1,总收率为26%。合成的效率取决于具有三个游离羟基的三糖受体2的制备,可以将其与三氯乙亚氨酸酯19糖基化以一步提供被保护的六糖20。通过顺序组装,从结构单元2,6-二-O-烯丙氧基羰基-3,4-二-获得化合物2。ø -苯甲酰基α- d -mannopyranose三氯(3),4-甲氧基苯基3,4-二- ö苯甲酰基α- d -mannopyranoside(4),和4-甲氧基苯基4- ø -乙酰基-3- ø -苯甲酰基-α - d-甘露吡喃糖苷(5)。由目标化合物和中间体的结构进行了表征¹ H和¹³ C NMR,MS,HRMS,和元素分析。 合成-低聚糖-甘露糖-假丝酵母-毛癣菌