Synthesis of 6-amino-1-hexyl 2-acetamido-2-deoxy-3-, -4-, and -6-O-β-D-galactopyranosyl-β-D-glucopyranosides
作者:John Vernon、Saul Roseman、Chuan Lee Yuan
DOI:10.1016/s0008-6215(00)85520-2
日期:1980.6
Abstract 6-Aminohexyl glycosides of β- D -Gal→β- D -GlcNAc disaccharides having β-(1→3)-, β-(1→4)-, and β-(1→6)-Iinkages were prepared. 6-(Benzyloxycarbonylamino)-1-hexanol was glycosylated with 2-acetamido-3,4,6-tri- O -acetyl-2-deoxy-α- D -glucopyranosyl chloride, to yield (80 %) a crystalline β-glycoside acetate (3), Deacetylation of 3 , followed by isopropylidenation (2,2-dimethoxypropane-TsOH)
摘要制备了具有β-(1→3)-,β-(1→4)-和β-(1→6)-构图的β-D-Gal→β-D-GlcNAc二糖的6-氨基己基糖苷。用2-乙酰氨基-3,4,6-三-O-乙酰基-2-脱氧-α-D-吡喃葡萄糖基氯将6-(苯甲氧基羰基氨基)-1-己醇糖基化,得到(80%)结晶β-糖苷乙酸(3),3的脱乙酰基,然后异丙基化(2,2-二甲氧基丙烷-TsOH),以总收率84%得到结晶的4,6-O-异亚丙基衍生物(5)。5 [苄基溴-BaO-Ba(OH 2)在N,N-二甲基甲酰胺中的苯甲酰化]生成其3-O-苄基衍生物,将其转化为6-(苄氧基羰基氨基)-1-己基2-乙酰氨基-3- O-苄基-2-脱氧-β-D-吡喃葡萄糖苷(7),总产率为69%。7、2、3、4的糖基化,6-四-O-乙酰基-α-D-吡喃半乳糖基溴化物(12)和三氟甲磺酸银在干燥的CH 2 Cl 2中在0°产生β-(1→6)-二糖苷(17),产