4-pentenyl 3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside | 385421-79-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: 4-pentenyl 3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside
• 英文别名: n-pentenyl 3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside；[(2R,3R,4S,5R,6R)-5-hydroxy-2-pent-4-enoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl] 2,2-dimethylpropanoate
• CAS: 385421-79-4
• 化学式: C₃₀H₄₀O₇
• 分子量: 512.643
• InChiKey: LLZSGXDDAPPERJ-RKFAPSRVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.9
• 重原子数：
  37
• 可旋转键数：
  15
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  83.4
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  4-pentenyl 3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside 在 叔丁基二甲硅基三氟甲磺酸酯 、 乙酸肼 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 2.0h， 生成 n-pentenyl 3,6-dibenzyl-2-pivaloyl-β-D-galactopyranosyl-(1->4)-3,6-dibenzyl-2-pivaloyl-β-D-glucopyranoside
  参考文献：
  名称：

  Linear Synthesis of the Tumor-Associated Carbohydrate Antigens Globo-H, SSEA-3, and Gb3

  摘要：

  The tumor-associated carbohydrate antigens Globo-H, SSEA-3, and Gb3 were synthesized in a linear fashion using glycosyl phosphate monosaccharide building blocks. All of the building blocks were prepared from readily available common precursors. The difficult alpha-(1-->4-cis)-galactosidic linkage was installed using a galactosyl phosphate donor with high selectivity. Introduction of the beta-galactosamine unit required the screening a variety of amine protecting groups to ensure good donor reactivity and protecting group compatibility. An N-trichloroacetyl-protected galactosamine donor performed best for the installation of the beta-glycosidic linkage. Conversion of the trichloroacetyl group to the N-acetyl group was achieved under mild conditions, fully compatible with the presence of multiple glycosidic bonds. This synthetic strategy is expected to be amenable to the synthesis of the globo-series of tumor antigens on solid-support.

  DOI：

  10.1021/jo025834+
• 作为产物：
  描述：

  3,6-Di-O-苯甲基-D-葡萄醛 在 4-二甲氨基吡啶 、 叔丁基二甲硅基三氟甲磺酸酯 、 二甲基二环氧乙烷 、 乙酸肼 、 N,N'-二异丙基碳二亚胺 作用下， 以 甲醇 、 二氯甲烷 、 丙酮 为溶剂， 反应 19.25h， 生成 4-pentenyl 3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside
  参考文献：
  名称：

  使用糖基磷酸酯结构单元线性合成受保护的H型II五糖。

  摘要：

  报道了利用糖基磷酸酯和糖基三氯乙酰亚氨酸酯结构单元线性合成完全受保护的H型II血型决定子五糖。设想了血型决定簇的自动固相合成，已证明糖基磷酸酯在逐步构建复杂的寡糖（例如H型II型抗原）中的效用。中央氨基葡萄糖结构单元的安装要求筛选各种氮保护基，以确保良好的氨基葡萄糖供体反应性和保护基的相容性。在存在其他羟基和胺保护基的情况下，区分末端半乳糖的C2的挑战促使我们引入2-（叠氮甲基）苯甲酰基作为碳水化合物合成的新型保护方式。检查了该基团与传统使用的保护基的相容性，以及其在糖基化中作为C2立体定向基团的用途。2-（叠氮甲基）苯甲酰基的应用以及对糖基供体的系统评价允许五糖的完成，并提供了预期普遍适用于血型决定簇的固相支持体合成的合成策略。

  DOI：

  10.1021/jo015987h

文献信息

• Toward the automated solid-phase synthesis of oligoglucosamines: systematic evaluation of glycosyl phosphate and glycosyl trichloroacetimidate building blocks
  作者：Luis G Melean、Kerry R Love、Peter H Seeberger

  DOI：10.1016/s0008-6215(02)00299-9

  日期：2002.11

  Glucosamines are common components of many biologically important oligosaccharides. Reported is a systematic evaluation of glucosamine phosphates and trichloroacetimidates as glycosylating agents for the efficient construction of beta-(1 --> 6) glucosamine linkages. A set of differentially protected glucosamine donors incorporating a host of amine protecting groups, including 2-phthaloyl, benzyloxycarbonyl (Z), trichloroetheoxycarbonyl (Troc) and trichloroacetyl (TCA) protective groups. were prepared. Donors were initially evaluated for reactivity and protecting group compatibility in a solution-phase study with a model 6-hydroxyl galactose acceptor. Based on these results, glucosamine donor 10 was selected for the solution-phase synthesis of a beta-(1 --> 6)-glucosamine pentasaccharide. Finally, building block 10 proved well suited for use in the automated solid-phase synthesis of a repeating unit trisaccharide. An assessment of glucosamine phosphate donors as potential glycosylating agents for a variety of glucosamine linkages is also discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.