2-O-p-nitrobenzoyl-3,4,6-tri-O-benzyl-α-D-galactopyranosyl trichloroacetimidate | 616861-66-6

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2-O-p-nitrobenzoyl-3,4,6-tri-O-benzyl-α-D-galactopyranosyl trichloroacetimidate
• 英文别名: [(2R,3R,4S,5S,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-2-(2,2,2-trichloroethanimidoyl)oxyoxan-3-yl] 4-nitrobenzoate
• CAS: 616861-66-6
• 化学式: C₃₆H₃₃Cl₃N₂O₉
• 分子量: 744.025
• InChiKey: OKWSQQYAHYYMDR-BWMDDLPLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.5
• 重原子数：
  50
• 可旋转键数：
  15
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  142
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  methyl 1-O-allyl-3,4-di-O-methoxymethyl-β-D-glucuronate 、 2-O-p-nitrobenzoyl-3,4,6-tri-O-benzyl-α-D-galactopyranosyl trichloroacetimidate 在 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 0.33h， 以24%的产率得到methyl (2-O-p-nitrobenzoyl-3,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1->2)-(allyl 3,4-di-O-methoxymethyl-β-D-glucopyranosid)uronate
  参考文献：
  名称：

  Synthesis of the trisaccharide portion of soyasaponin βg: evaluation of a new glucuronic acid acceptor

  摘要：

  The synthesis of the trisaccharide portion of soyasaponin betag was successfully achieved using a new glucuronic acid acceptor: methyl 1-O-allyl-3 4-di-O-methoxymethyl-beta-D-glucuronate (9). This compound and methyl 1-O-allyl-3,4-di-O-tert-butyldimethyl-silyl-beta-D-glucuronate (8) were both prepared from glucuronolactone via a glycal intermediate. The former compound 9 was successfully coupled to ethyl 2-O-benzoyl-3,4,6-tri-O-benzyl-1-thio-beta-D-galactopyranoside (13) in excellent yield. Synthesis of the protected trisaccharide was then completed by the addition of a suitably protected rhamnose derivative to the disaccharide portion. The reactivity of the glucuronic acid derivative 9 was also explored with trichloroacetimidate and fluoride donors. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(03)00195-2
• 作为产物：
  描述：

  allyl 3,4,6-tri-O-benzyl-β-D-galactopyranoside 在 Rh(PPh₃)Cl 三乙烯二胺 、 4-二甲氨基吡啶 、 potassium carbonate 、 N,N'-二环己基碳二亚胺 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 、 水 、 甲苯 为溶剂， 反应 23.5h， 生成 2-O-p-nitrobenzoyl-3,4,6-tri-O-benzyl-α-D-galactopyranosyl trichloroacetimidate
  参考文献：
  名称：

  Synthesis of the trisaccharide portion of soyasaponin βg: evaluation of a new glucuronic acid acceptor

  摘要：

  The synthesis of the trisaccharide portion of soyasaponin betag was successfully achieved using a new glucuronic acid acceptor: methyl 1-O-allyl-3 4-di-O-methoxymethyl-beta-D-glucuronate (9). This compound and methyl 1-O-allyl-3,4-di-O-tert-butyldimethyl-silyl-beta-D-glucuronate (8) were both prepared from glucuronolactone via a glycal intermediate. The former compound 9 was successfully coupled to ethyl 2-O-benzoyl-3,4,6-tri-O-benzyl-1-thio-beta-D-galactopyranoside (13) in excellent yield. Synthesis of the protected trisaccharide was then completed by the addition of a suitably protected rhamnose derivative to the disaccharide portion. The reactivity of the glucuronic acid derivative 9 was also explored with trichloroacetimidate and fluoride donors. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(03)00195-2

文献信息

• Synthesis of the trisaccharide portion of soyasaponin βg: evaluation of a new glucuronic acid acceptor
  作者：Karen Plé

  DOI：10.1016/s0008-6215(03)00195-2

  日期：2003.7

  The synthesis of the trisaccharide portion of soyasaponin betag was successfully achieved using a new glucuronic acid acceptor: methyl 1-O-allyl-3 4-di-O-methoxymethyl-beta-D-glucuronate (9). This compound and methyl 1-O-allyl-3,4-di-O-tert-butyldimethyl-silyl-beta-D-glucuronate (8) were both prepared from glucuronolactone via a glycal intermediate. The former compound 9 was successfully coupled to ethyl 2-O-benzoyl-3,4,6-tri-O-benzyl-1-thio-beta-D-galactopyranoside (13) in excellent yield. Synthesis of the protected trisaccharide was then completed by the addition of a suitably protected rhamnose derivative to the disaccharide portion. The reactivity of the glucuronic acid derivative 9 was also explored with trichloroacetimidate and fluoride donors. (C) 2003 Elsevier Science Ltd. All rights reserved.