benzyl O-<2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)-ethylidene>-3-O-methyl-β-D-glucopyranosyl>-(1<*>3)-2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)ethylidene>-α-D-glucopyranoside | 145835-80-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: benzyl O-<2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)-ethylidene>-3-O-methyl-β-D-glucopyranosyl>-(1<*>3)-2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)ethylidene>-α-D-glucopyranoside
• 英文别名: methyl (2S,4aR,6S,7R,8S,8aR)-8-[[(2S,4aR,6S,7R,8S,8aR)-7-benzoyloxy-8-methoxy-2-methoxycarbonyl-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxy]-7-benzoyloxy-2-methyl-6-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2-carboxylate
• CAS: 145835-80-9
• 化学式: C₄₂H₄₆O₁₇
• 分子量: 822.817
• InChiKey: RMDCWWZXXQIWRT-KCCHCYBXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  59
• 可旋转键数：
  16
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  188
• 氢给体数：
  0
• 氢受体数：
  17

反应信息

• 作为反应物：
  描述：

  benzyl O-<2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)-ethylidene>-3-O-methyl-β-D-glucopyranosyl>-(1<*>3)-2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)ethylidene>-α-D-glucopyranoside 在 palladium on activated charcoal 、 三氟甲磺酸三甲基硅酯 、 sodium methylate sodium hydroxide 、 氢气 、 potassium carbonate 、 三氯乙腈 作用下， 以 甲醇 、 水 、 溶剂黄146 为溶剂， 反应 138.0h， 生成 (2S,4aR,6S,7R,8R,8aR)-6-[[(2S,4aR,6S,7R,8R,8aR)-2-carboxy-6-[(2R,3S,4R,5R,6R)-4,5-dihydroxy-2-(hydroxymethyl)-6-methoxyoxan-3-yl]oxy-7-hydroxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-7-hydroxy-8-methoxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2-carboxylic acid
  参考文献：
  名称：

  使用TIPS保护的糖苷构建寡糖的新型融合策略。耻垢分枝杆菌糖脂相关片段的合成

  摘要：

  将4，6- O-丙酮酸化的葡糖苷1分别转化为相应的葡糖基氟化物3和2，3 - O -TIPS保护的葡糖吡喃糖苷5。3和5的路易斯酸催化的偶合提供了丙酮酸化的二糖6，其中之一通过二糖供体8被进一步转化为耻垢分枝杆菌的二糖和三糖片段。

  DOI：

  10.1016/s0040-4039(00)60999-1
• 作为产物：
  描述：

  benzyl 2-O-benzoyl-4,6-O-<(S)-1-methoxycarbonylethylidene>-3-O-methyl-α-D-glucopyranoside 在 palladium on activated charcoal 吡啶 、 三氟甲磺酸三甲基硅酯 、 氢气 、 sodium carbonate 、 苯甲酰氯 作用下， 以 二氯甲烷 、 溶剂黄146 为溶剂， 20.0~25.0 ℃ 、101.01 kPa 条件下， 反应 50.0h， 生成 benzyl O-<2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)-ethylidene>-3-O-methyl-β-D-glucopyranosyl>-(1<*>3)-2-O-benzoyl-4,6-O-<(S)-1-(methoxycarbonyl)ethylidene>-α-D-glucopyranoside
  参考文献：
  名称：

  Synthetic studies toward pyruvate acetal containing saccharides. Synthesis of the carbohydrate part of the Mycobacterium smegmatis pentasaccharide glycolipid and fragments thereof for the preparation of neoantigens

  摘要：

  A series of 2,3-di-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-D-glucopyranosyl donors (beta-phenylthio 3, bromide 4, alpha-chloride 5, beta-fluoride 6, and trichloroacetimidate 7) were prepared from the corresponding alpha-allyl glucoside 1 via the deallylated glucose 2 and were tested in glycosylation reactions with methanol to give the pyruvylated methyl glucosides 8 and 9 and with methyl 2,4,6-tri-O-benzoyl-beta-D-glucopyranoside 10 to give the disaccharide 11. Best results with respect to yield and beta-selectivity of the coupling were achieved with imidate 7. Thus, the 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-3-O-methyl-D-glucopyranosyl trichloroacetimidate 14 was prepared from its benzyl glucoside 12 and used for the synthesis of fragments related to the Mycobacterium smegmatis lipopentasaccharide. Trimethylsilyl trifluoromethanesulfonate-mediated condensation of 14, 5-[(benzyloxycarbonyl)amino]pentanol, and 10, respectively, followed by deblocking of the products 15 and 17 gave the pyruvylated aminopentyl glucoside 16 and methyl laminaribioside 18. Treatment of 17 with dichloromethyl methyl ether gave the laminaribiosyl chloride 19, coupling of which with protected 5-aminopentanol gave 20 also obtained from 14 and the monosaccharide nucleophile 26. The trisaccharide 5-aminopentyl glycoside fragment 42 was prepared by first coupling of 14 and benzyl 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-alpha-D-glucopyranoside 30 that was converted to the bispyruvylated laminaribiose imidate 33, followed by condensation with thioglycoside 38 obtainable in four steps from 1,2,4,6-tetra-O-acetyl-3-O-benzyl-beta-D-glucopyranose to give the trisaccharide ethyl thioglycoside 40. Next, NIS-mediated condensation of 40 and 5-[(benzyloxycarbonyl)amino]pentanol followed by deblocking gave 42. Pentasaccharide 45 was similarly prepared from 40 and hepta-O-benzoyltrehalose 43 to give first the blocked saccharide 44, deblocking of which afforded the target pentasaccharide.

  DOI：

  10.1021/jo00057a021