A facile and effective synthesis of α-(1→6)-linked mannose di-, tri-, tetra-, hexa-, octa-, and dodecasaccharides, and β-(1→6)-linked glucose di-, tri-, tetra-, hexa-, and octasaccharides using sugar trichloroacetimidates as the donors and unprotected or partially protected glycosides as the acceptors
作者:Yuliang Zhu、Fanzuo Kong
DOI:10.1016/s0008-6215(01)00070-2
日期:2001.5
coupling of 12 with the octasaccharide acceptor 20 . Similar strategies were used for the syntheses of β-(1→6)-linked glucose di-, tri-, tetra-, hexa-, and octamers. Deprotection of the oligosaccharides in ammonia-saturated methanol yielded the free α-(1→6)-linked mannosyl and β-(1→6)-linked glucosyl oligomers.
摘要在TMSOTf存在下,2,3,4,6-四-O-乙酰基-α-d-甘露吡喃糖基三氯亚氨基酸酯与烯丙基α-d-甘露吡喃糖苷选择性地产生2,3,4,6-四-O-烯丙基通过原酸酯中间体形成乙酰基-α-d-甘露吡喃糖基-(1→6)-α-d-甘露吡喃糖苷。3的苯甲酰化,然后脱醛,然后三氯酰亚胺化,得到二糖供体2,3,4,6-四-O-乙酰基-α-d-甘露吡喃糖基-(1→6)-2,3,4-三-O -苯甲酰基-α-d-甘露吡喃糖基三氯亚氨酸酯,而3的苯甲酰化,然后选择性除去乙酰基,则产生二糖受体烯丙基α-d-甘露糖吡喃糖基-(1→6)-2,3,4-三-O-苯甲酰基- α-d-甘露吡喃糖苷。5与6偶合得到四糖烯丙基2,3,4,6-四-O-乙酰基-α-d-甘露吡喃糖基-(1→6)-2,3,4-三-O-苯甲酰基-α-d -甘露吡喃糖基-(1→6)-α-d-甘露吡喃糖基-(1→6)-2,3,4-三-O-苯甲酰基-α-d-甘露吡喃糖苷,转化为四糖供体2