Dimethylthexylsilyl 2-acetamido-3-O-allyl-2-deoxy-6-O-(4-methoxybenzyl)-β-d-glucopyranoside, dimethylthexylsilyl 3,4,6-tri-O-benzyl-β-d-mannopyranosyl-(1→4)-2-acetamido-3-O-allyl-2-deoxy-6-O-(4-methoxybenzyl)-β-d-glucopyranoside, and dimethylthexylsilyl 2-O-(benzylsulfonyl)-3,4,6-tri-O-benzyl-β-d-mannopyranosyl-(1→4)-2-acetamido-3-O-allyl-2-deoxy-6-O-(4-methoxybenzyl)-β-d-glucopyranoside: synthesis of authentic samples
作者:David Crich、Ming Li、Prasanna Jayalath
DOI:10.1016/j.carres.2008.10.007
日期:2009.1
Dimethylthexylsilyl 2-acetamido-3-O-allyl-2-deoxy-6-O-(4-methoxybenzyl)-beta-D-glucopyranoside was prepared by reduction of the corresponding 4,6-O-(4-methoxybenzylidene) acetal with sodium cyanoborohydride and trifluoroacetic acid. This alcohol was coupled to 2-O-benzoyl-3,4,6-tri-O-benzyl-alpha-D-glucopyranosyl trichloroacetimidate to give a beta-glucoside that was converted to dimethylthexylsilyl
通过将相应的4,6-O-(4-甲氧基亚苄基)乙缩醛还原为二甲基甲氧基甲硅烷基2-乙酰氨基-3-O-烯丙基-2-脱氧-6-O-(4-甲氧基苄基)-β-D-吡喃葡萄糖苷。氰基硼氢化钠和三氟乙酸。将该醇与2-O-苯甲酰基-3,4,6-三-O-苄基-α-D-吡喃葡萄糖基三氯乙酰亚胺酸酯偶合,得到β-葡糖苷,其被转化为二甲基甲硅烷基甲硅烷基3,4,6-三-O-苄基-β-D-甘露吡喃糖基-(1→4)-2-乙酰胺基-3-O-烯丙基-2-脱氧-6-O-(4-甲氧基苄基)-β-D-吡喃葡萄糖苷马丁氧化,和硼氢化钠还原。然后进行磺酰化得到二甲基甲硅烷基甲硅烷基2-O-(苄基磺酰基)-3,4,6-三-O-苄基-β-D-甘露吡喃糖基-(1→4)-2-乙酰胺基-3-O-烯丙基-2-脱氧-6-O-(4-甲氧基苄基)-β-D-吡喃葡萄糖苷。