Synthetic Studies on Sialoglycoconjugates 23: Total Synthesis of Sialyl-α(2↠6)-Lactotetraosylceramide and Sialyl-α(2↠6)-Neolactotetraosylceramide

Synthetic Studies on Sialoglycoconjugates 23: Total Synthesis of Sialyl-α(2↠6)-Lactotetraosylceramide and Sialyl-α(2↠6)-Neolactotetraosylceramide
复制标题

唾液酸糖缀合物的合成研究23:唾液酸-α(2↠6)-乳四糖神经酰胺和唾液酸-α(2↠6)-新乳四糖神经酰胺的全合成

DOI:
10.1080/07328309108543920
复制
发表时间:
1991
影响因子:
1
通讯作者:
M. Kiso
M. Kiso
中科院分区:
化学4区
文献类型:
--
作者:
A. Hasegawa;K. Hotta;A. Kameyama;H. Ishida;M. Kiso

文献摘要

参考文献

被引文献

相似文献

本文首次报道了唾液酸-α(2 → 6)-乳糖四糖神经酰胺(29,IV 6 NeuAcLc4Cer)和唾液酸-α(2 → 6)-新油酸四糖神经酰胺(33,IV 6 NeuAcnLc4Cer)的全合成。甲基O-以5-乙酰氨基-4,7,8,9-四-O-乙酰基-3,5-二脱氧-D-甘油-α-D-半乳糖基-2-壬基吡喃糖酸甲酯为原料,经糖基化反应合成了关键糖基供体-(2 → 6)-2,4-二-O-苯甲酰基-3-O-苄基-1-硫代-s-D-吡喃半乳糖苷(11)。(三甲基硅基)乙基3-O-苄基-s-D-吡喃半乳糖苷(2)与N-乙酰神经氨酸的甲基α-硫代糖苷3,苯甲酰化,取代2-通过乙酰基引入(三甲基甲硅烷基)乙基,以及用(甲硫基)三甲基硅烷引入甲硫基。2-(三甲基硅基)乙基O-(2-乙酰氨基-4,6-O-亚苄基-2-脱氧-s-D-吡喃葡萄糖基)-(1 → 3 ′)-全-O-苄基-s-D-乳糖苷(12)或2-(三甲基硅基)乙基O-(2-乙酰氨基-3-O-乙酰基-6-O-苄基-2-脱氧-s-D-吡喃葡萄糖基)-(1 → 3 ′)-全-O-苄基-s-D-乳糖苷(14)经O-乙酰化和还原开环后,分别偶联成β-葡萄糖苷和β-葡萄糖苷。
ABSTRACT The first total syntheses of sialyl-α(2→6)-lactotetraosylceramide (29, IV6NeuAcLc4Cer) and sialyl-α(2→6)-neolatotetraosylceramide (33, IV6NeuAcnLc4Cer) are described. Methyl O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosylonate)-(2→6)-2,4-di-O-benzoyl-3-O-benzyl-1-thio-s-D-galactopyranoside (11), the key glycosyl donor was prepared, via glycosylation of 2-(trimethylsilyl)ethyl 3-O-benzyl-s-D-galactopyranoside (2) with the methyl α-thioglycoside 3 of N-acetylneuraminic acid, benzoylation, replacement of the 2-(trimethylsilyl)ethyl group by acetyl, and introduction of the methylthio group with (methylthio)trimethylsilane. Each coupling of 2-(trimethylsilyl)ethyl O-(2-acetamido-4,6-O-benzylidene-2-deoxy-s-D-glucopyranosyl)-(1→3′)-per-O-benzyl-s-lactoside (12) or 2-(trimethylsilyl)ethyl O-(2-acetamido-3-O-acetyl-6-O-benzyl-2-deozy-s-D-glucopyranosyl)-(1→3′)-per-O-benzyl-s-D-lactoside (14) prepared from 12 by O-acetylation and reductive opening of the be...
神经节苷脂的膜受体与中枢神经系统髓磷脂相关。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Tiemeyer,M;Swank-Hill,P;Schnaar,RL
通讯作者: Schnaar,RL