(4S,5R,6R,8aR)-acetic acid 5,6-bis-allyloxy-4-(4-chloro-phenyl)-2-phenyl-4a,6,7,8a-tetrahydro-4H, 5H-pyrano[3,2-e][1,3]oxazin-7-ylmethyl ester | 1332628-42-8

• 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: (4S,5R,6R,8aR)-acetic acid 5,6-bis-allyloxy-4-(4-chloro-phenyl)-2-phenyl-4a,6,7,8a-tetrahydro-4H, 5H-pyrano[3,2-e][1,3]oxazin-7-ylmethyl ester
• CAS: 1332628-42-8
• 化学式: C₂₈H₃₀ClNO₆
• 分子量: 512.002
• InChiKey: YCCAWXGMBPDUBZ-LIHOMHCMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.9
• 重原子数：
  36.0
• 可旋转键数：
  10.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  75.58
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为产物：
  描述：

  3,4-di-O-(2-propenyl)-6-O-acetyl-D-galactal 、 N-benzoyl-1-methoxy-1-(p-chlorophenyl)-methylamine 在 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以85%的产率得到(4S,5R,6R,8aR)-acetic acid 5,6-bis-allyloxy-4-(4-chloro-phenyl)-2-phenyl-4a,6,7,8a-tetrahydro-4H, 5H-pyrano[3,2-e][1,3]oxazin-7-ylmethyl ester
  参考文献：
  名称：

  Highly Facialselective Synthesis of Pyranose 1,3-Oxazines and Their Ring Opening with Nucleophiles: A Novel Entry to 2-C-Branched Glycosides

  摘要：

  A TMSOTf-promoted cycloaddition of N-benzoyl-N,O-acetals with various glycals and 3-deoxy glycals affords pyranose 1,3-oxazines with high facial selectivity. In addition, a highly diastereoselective ring opening of the resulting pyranose 1,3-oxazines is reported. With diverse nucleophiles, these reactions take place upon heating at 80 degrees C. This novel ring-opening reaction affords structurally diversified 2-C-branched glycosides with three newly formed contiguous stereocenters.

  DOI：

  10.1021/ol2019604