(3aS,4S,7S,8aR)-Hexahydro-7-(phenylselenenyl)-4-<(E)-propenyl>-1H,3H-furo<3,4-c>oxepin-3-one | 1027314-38-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氧杂环己烷
• 英文名称: (3aS,4S,7S,8aR)-Hexahydro-7-(phenylselenenyl)-4-<(E)-propenyl>-1H,3H-furo<3,4-c>oxepin-3-one
• 英文别名: (3aS,4S,7S,8aR)-7-phenylselanyl-4-[(E)-prop-1-enyl]-3a,4,6,7,8,8a-hexahydro-1H-furo[3,4-c]oxepin-3-one
• CAS: 1027314-38-0
• 化学式: C₁₇H₂₀O₃Se
• 分子量: 351.304
• InChiKey: MGEUZEYRUMCSKA-VIIMRFSDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.96
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (3aS,4S,7S,8aR)-Hexahydro-7-(phenylselenenyl)-4-<(E)-propenyl>-1H,3H-furo<3,4-c>oxepin-3-one 在 sodium periodate 、 碳酸氢钠 作用下， 以 甲醇 、 水 为溶剂， 反应 1.0h， 以56%的产率得到(3aS,4S,8aR)-3a,4,6,8a-Tetrahydro-4-<(E)-propenyl>-1H,3H-furo<3,4-c>oxepin-3-one
  参考文献：
  名称：

  Suitability of the Claisen ring expansion protocol for crenulide diterpene construction

  摘要：

  An enantiospecific synthesis of optically pure 2 a molecule possessing the ring system characteristic of the crenulide diterpenes, is reported. The nine-step sequence began with the previously described R lactone 6. The early bond-forming reactions include an aldol condensation with crotonaldehyde and intramolecular selenonium ion-promoted cyclization with participation by the neighboring hydroxyl group. Selenoxide elimination made possible the acquisition of allyl vinyl ether 4. Thermal activation of the latter in hot mesitylene proceeded via a Claisen ring expansion pathway to give 36a. This key intermediate was then ketalized, subjected to Simmons-Smith cyclopropanation, and carried through a selenoxide elimination step to arrive ultimately at 2. Selected transformations of the medium-ring bicyclic lactones are described, accompanied by X-ray crystallographic studies to substantiate the stereochemical assignments advanced throughout the investigation.

  DOI：

  10.1021/jo00110a053
• 作为产物：
  描述：

  (R)-4-allyldihydrofuran-2(3H)-one 在 sodium periodate 、 碳酸氢钠 、 对甲苯磺酸 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 二氯甲烷 、 水 为溶剂， 反应 7.0h， 生成 (3aS,4S,7S,8aR)-Hexahydro-7-(phenylselenenyl)-4-<(E)-propenyl>-1H,3H-furo<3,4-c>oxepin-3-one
  参考文献：
  名称：

  Suitability of the Claisen ring expansion protocol for crenulide diterpene construction

  摘要：

  An enantiospecific synthesis of optically pure 2 a molecule possessing the ring system characteristic of the crenulide diterpenes, is reported. The nine-step sequence began with the previously described R lactone 6. The early bond-forming reactions include an aldol condensation with crotonaldehyde and intramolecular selenonium ion-promoted cyclization with participation by the neighboring hydroxyl group. Selenoxide elimination made possible the acquisition of allyl vinyl ether 4. Thermal activation of the latter in hot mesitylene proceeded via a Claisen ring expansion pathway to give 36a. This key intermediate was then ketalized, subjected to Simmons-Smith cyclopropanation, and carried through a selenoxide elimination step to arrive ultimately at 2. Selected transformations of the medium-ring bicyclic lactones are described, accompanied by X-ray crystallographic studies to substantiate the stereochemical assignments advanced throughout the investigation.

  DOI：

  10.1021/jo00110a053

文献信息

• Suitability of the Claisen ring expansion protocol for crenulide diterpene construction
  作者：Leo A. Paquette、Jesus Ezquerra、Wei He

  DOI：10.1021/jo00110a053

  日期：1995.3

  An enantiospecific synthesis of optically pure 2 a molecule possessing the ring system characteristic of the crenulide diterpenes, is reported. The nine-step sequence began with the previously described R lactone 6. The early bond-forming reactions include an aldol condensation with crotonaldehyde and intramolecular selenonium ion-promoted cyclization with participation by the neighboring hydroxyl group. Selenoxide elimination made possible the acquisition of allyl vinyl ether 4. Thermal activation of the latter in hot mesitylene proceeded via a Claisen ring expansion pathway to give 36a. This key intermediate was then ketalized, subjected to Simmons-Smith cyclopropanation, and carried through a selenoxide elimination step to arrive ultimately at 2. Selected transformations of the medium-ring bicyclic lactones are described, accompanied by X-ray crystallographic studies to substantiate the stereochemical assignments advanced throughout the investigation.