isolated from the maycelia of Epidermophyton floccosum . Methylation, periodate oxidation, and acetolysis studies suggested that S-lawe is composed of (1→6)- O α- d -mannopyranosyl-(1→6)- O -[α- d -mannopyranosyl-(1→2)]- O -α- d -mannopyranosyl repeating units. Condensation of 2,3,4,6-tetra- O -acetyl-α- d -mannopyranosyl bromide with methyl 3- O -benzyl-4,6- O -benzylidene-α- d -mannopyranoside in
摘要从絮状表皮菌丝中分离出一种碱溶性
多糖,称为S-Iawe。甲基化,高
碘酸盐氧化和乙酰
水解研究表明S-律由(1→6)-Oα-d-甘露
吡喃糖基-(1→6)-O- [α-d-甘露
吡喃糖基-(1→2)]组成-O-α-d-甘露
吡喃糖基重复单元。在
氰化汞的存在下,将2,3,4,6-四-O-乙酰基-α-d-甘露
吡喃糖基
溴化物与甲基3-O-苄基-4,6-O-亚苄基-α-d-甘露
吡喃糖苷缩合得到以70%的收率得到甲基3-O-苄基-4,6-O-亚苄基-2-O-(2,3,4,6-四-O-乙酰基-α-d-甘露
吡喃糖基)-α-d-甘露
吡喃糖苷。脱亚苄基二糖与2,3,4,6-四-O-乙酰基-α-d-甘露酰
吡喃糖基
溴的缩合提供相应的三糖重复单元。