2-O-benzoyl-4,6-O-benzylidene-3-O-chloroacetyl-α-D-glucopyranosyl trichloroacetimidate | 400865-06-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: 2-O-benzoyl-4,6-O-benzylidene-3-O-chloroacetyl-α-D-glucopyranosyl trichloroacetimidate
• 英文别名: [(2R,4aR,6R,7R,8S,8aR)-8-(2-chloroacetyl)oxy-2-phenyl-6-(2,2,2-trichloroethanimidoyl)oxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] benzoate
• CAS: 400865-06-7
• 化学式: C₂₄H₂₁Cl₄NO₈
• 分子量: 593.245
• InChiKey: JZDKLHJYANODJC-OACQCUBKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  37
• 可旋转键数：
  9
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  113
• 氢给体数：
  1
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  2-O-benzoyl-4,6-O-benzylidene-3-O-chloroacetyl-α-D-glucopyranosyl trichloroacetimidate 在 2,2,6,6-tetramethyl-piperidine-N-oxyl 三乙烯二胺 、 sodium hypochlorite 、 sodium tetrahydroborate 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 四丁基溴化铵 、 sodium methylate 、 碳酸氢钠 、 三氟乙酸 作用下， 以 甲醇 、 sodium hydroxide 、 乙醇 、 二氯甲烷 、 甲苯 为溶剂， 反应 9.0h， 生成 3-aminopropyl (β-D-glucopyranosyluronic acid)-(1->4)-β-D-glucopyranoside
  参考文献：
  名称：

  Synthesis ofStreptococcus pneumoniae Type 3 Neoglycoproteins Varying in Oligosaccharide Chain Length, Loading and Carrier Protein

  摘要：

  The preparation is described of a range of neoglycoproteins containing synthesised fragments of the capsular polysaccharide of Streptococcus pneumoniae type 3, that is beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->O)-(CH2)3NH2 (1), beta-D-Glcp-(1-->3)-beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->O)-(CH2)3NH2 (2), and beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->3)-beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->O)-(CH4)NH2 (3). A blockwise approach was developed for the synthesis of the protected carbohydrate chains, in which the carboxylic groups were introduced prior to deprotection by selective oxidation of HO-6 in the presence of HO-4 by using TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy radical). After deprotection, the 3-aminopropyl spacer of the fragments was elongated with diethyl squarate (3,4-diethoxy-3-cyclobutene-1,2-dione) and the elongated oligosaccharides were conjugated to CRM197 (cross-reacting material of diphtheria toxin), KLH (keyhole limpet hemocyanin) or TT (tetanus toxoid). The resulting neoglycoconjugates varied in oligosaccharide chain length, oligosaccharide loading and protein carrier. These well-defined conjugates are ideal probes for evaluating the influence of the different structural parameters in immunological tests.

  DOI：

  10.1002/1521-3765(20011015)7:20<4411::aid-chem4411>3.0.co;2-t
• 作为产物：
  描述：

  allyl 3-O-chloroacetyl-2-O-benzoyl-4,6-O-benzylidene-α-D-glucopyranoside 在 sodium acetate 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 palladium dichloride 作用下， 以 二氯甲烷 、 水 、 溶剂黄146 为溶剂， 反应 2.0h， 生成 2-O-benzoyl-4,6-O-benzylidene-3-O-chloroacetyl-α-D-glucopyranosyl trichloroacetimidate
  参考文献：
  名称：

  Synthesis of heptasaccharide and nonasaccharide analogues of the lentinan repeating unit

  摘要：

  The allyl glycoside beta-D-Glcp-(1 --> 3)-beta-D-Glcp-(1 --> 3)-[beta-D-Glcp-(1 --> 6)]-beta-D-Glcp-(1 --> 3)-beta-D-Glcp-(1 --> 3)-[beta-D-Glcp(1 --> 6)]-alpha-D-Glcp (18) and the acetonyl glycoside of beta-D-Glcp-(1 --> 3)-[beta-D-Glcp-(1 --> 6)]-beta-D-Glcp-(1 --> 3)-beta-D-Glcp-(1 --> 3)-[beta-D-Glcp-(1 --> 6)]-beta-D-Glcp-(1 --> 3)-beta-D-Glcp-(1 --> 3)-[beta-D-Glcp-(1 --> 6)]-alpha-D-Glcp (28) were synthesized as analogues of the lentinan heptaose repeating unit. 4,6-O-Benzylidenated monosaccharide donor 3 and 4,6-0-benzylidenated tetrasaccharide acceptor 14 were used to ensure the P-linkage in the synthesis of 18, while 4,6-0-benzylidenated disaccharide acceptor 20, and 4,6-0-benzylidenated disaccharide donors 21 and 24 were used to ensure the beta-linkage in the synthesis of 28. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2004.11.005