benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(R)-(2-methoxybenzylidene)-α-D-glucopyranoside | 195254-01-4

• 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: benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(R)-(2-methoxybenzylidene)-α-D-glucopyranoside
• CAS: 195254-01-4
• 化学式: C₂₉H₃₁NO₈
• 分子量: 521.567
• InChiKey: ITUNTDMPCOCPLU-PYFBZWTESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.71
• 重原子数：
  38.0
• 可旋转键数：
  8.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  104.71
• 氢给体数：
  2.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(R)-(2-methoxybenzylidene)-α-D-glucopyranoside 在 氢氧化钾 、 lithium aluminium tetrahydride 、 三氯化铝 作用下， 以 1,4-二氧六环 、 乙醚 、 二氯甲烷 为溶剂， 反应 28.5h， 生成 benzyl 3-O-benzyl-2-deoxy-2-methylamino-4,6-O-(R)-(2-methoxybenzylidene)-α-D-glucopyranoside
  参考文献：
  名称：

  Unexpected Products in the Lialh₄/Alcl₃-Reduction of 3-O-Substituted and N-Benzyloxycarbonyl-Protected 4,6-O-[2-Methoxybenzylidene]-α-D-Glucosamine Derivatives

  摘要：

  The reductive cleavage of benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(2-methoxybenzylidene)-alpha-D-glucopyranoside 2 with LiAlH4-AlCl3 gave the corresponding 4-O-(2-methoxybenzyl) ether along with the 6-O-ether as expected. When, however, the 3-hydroxyl group was substituted, acetal cleavage was not the main reaction path. With a 3-O-allyl or a 3-O-methyl group, the unsymmetrical urea derivatives 8 resulted together with the formamido and N-methylamino derivatives 9 and 10, respectively, and no acetal cleavage was observed. Substitution at O-3 with a benzyl group allowed the formation of a small amount of 4-O-ether along with the formamido and N-methylamino derivatives with intact 2-methoxybenzylidene group.

  DOI：

  10.1080/07328309708006541
• 作为产物：
  描述：

  2-甲氧基苯甲醛缩二甲醇 、 benzyl-(2-benzyloxycarbonylamino-2-deoxy-α-D-glucopyranoside) 以 N,N-二甲基甲酰胺 为溶剂， 85.0 ℃ 、25.0 kPa 条件下， 反应 3.0h， 以93%的产率得到benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(R)-(2-methoxybenzylidene)-α-D-glucopyranoside
  参考文献：
  名称：

  Unexpected Products in the Lialh₄/Alcl₃-Reduction of 3-O-Substituted and N-Benzyloxycarbonyl-Protected 4,6-O-[2-Methoxybenzylidene]-α-D-Glucosamine Derivatives

  摘要：

  The reductive cleavage of benzyl 2-benzyloxycarbonylamino-2-deoxy-4,6-O-(2-methoxybenzylidene)-alpha-D-glucopyranoside 2 with LiAlH4-AlCl3 gave the corresponding 4-O-(2-methoxybenzyl) ether along with the 6-O-ether as expected. When, however, the 3-hydroxyl group was substituted, acetal cleavage was not the main reaction path. With a 3-O-allyl or a 3-O-methyl group, the unsymmetrical urea derivatives 8 resulted together with the formamido and N-methylamino derivatives 9 and 10, respectively, and no acetal cleavage was observed. Substitution at O-3 with a benzyl group allowed the formation of a small amount of 4-O-ether along with the formamido and N-methylamino derivatives with intact 2-methoxybenzylidene group.

  DOI：

  10.1080/07328309708006541