(6aS,10aR)-1-Methoxy-6,6a,7,8,10,10a-hexahydro-6,6-dimethyl-9H-dibenzopyran-9-one | 132345-29-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: (6aS,10aR)-1-Methoxy-6,6a,7,8,10,10a-hexahydro-6,6-dimethyl-9H-dibenzopyran-9-one
• CAS: 132345-29-0
• 化学式: C₁₆H₂₀O₃
• 分子量: 260.333
• InChiKey: PZGFAYIBCWMTFK-NEPJUHHUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.32
• 重原子数：
  19.0
• 可旋转键数：
  1.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  35.53
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  (6aS,10aR)-1-Methoxy-6,6a,7,8,10,10a-hexahydro-6,6-dimethyl-9H-dibenzopyran-9-one 在 三氯化铝 作用下， 以 二氯甲烷 为溶剂， 反应 12.0h， 以79%的产率得到(6aR,10aR)-1-Methoxy-6,6-dimethyl-6,6a,7,8,10,10a-hexahydro-benzo[c]chromen-9-one
  参考文献：
  名称：

  Synthesis of both enantiomers of nabilone from a common intermediate. Enantiodivergent synthesis of cannabinoids

  摘要：

  Both enantiomers of the synthetic cannabinoid nabilone (4) have been synthesized from a common intermediate, enone 7. Enone 7 was prepared by reaction of [2,6-dimethoxy-4-(1,1-dimethylheptyl)phenyl]lithium with (+)-apoverbenone (2), followed by PDC oxidation. Li/NH3 reduction of 7 gave saturated ketone 9, which, after ether cleavage to 10, afforded (6aS,10aR)-hexahydrodibenzopyran 15 on reaction with SnCl4. Isomerization to 6aR,10aR ketone 16 followed by ether cleavage gave the 6aR,10aR enantiomer of nabilone (4). The 6aS,10aS enantiomer of 4 (24) was prepared from 7 by ether cleavage to 18 and rearrangement to nonracemic tetrahydrodibenzopyran 20 using AlCl3. Dissolving metal reduction of 20 followed by ether cleavage gave the 6aS,10aS enantiomer of nabilone (24). A model sequence employing (2,6-dimethoxyphenyl)lithium at the first step was carried out and the structure of one of the intermediates, ketone 12, was established by X-ray crystallography. A new preparation of apoverbenone (2) has been developed.

  DOI：

  10.1021/jo00006a021
• 作为产物：
  描述：

  4-(2-Hydroxy-6-methoxyphenyl)-6,6-dimethylbicyclo<3.1.1>heptan-2-one 在 四氯化锡 作用下， 以 氯仿 为溶剂， 反应 18.0h， 以80%的产率得到(6aS,10aR)-1-Methoxy-6,6a,7,8,10,10a-hexahydro-6,6-dimethyl-9H-dibenzopyran-9-one
  参考文献：
  名称：

  Synthesis of both enantiomers of nabilone from a common intermediate. Enantiodivergent synthesis of cannabinoids

  摘要：

  Both enantiomers of the synthetic cannabinoid nabilone (4) have been synthesized from a common intermediate, enone 7. Enone 7 was prepared by reaction of [2,6-dimethoxy-4-(1,1-dimethylheptyl)phenyl]lithium with (+)-apoverbenone (2), followed by PDC oxidation. Li/NH3 reduction of 7 gave saturated ketone 9, which, after ether cleavage to 10, afforded (6aS,10aR)-hexahydrodibenzopyran 15 on reaction with SnCl4. Isomerization to 6aR,10aR ketone 16 followed by ether cleavage gave the 6aR,10aR enantiomer of nabilone (4). The 6aS,10aS enantiomer of 4 (24) was prepared from 7 by ether cleavage to 18 and rearrangement to nonracemic tetrahydrodibenzopyran 20 using AlCl3. Dissolving metal reduction of 20 followed by ether cleavage gave the 6aS,10aS enantiomer of nabilone (24). A model sequence employing (2,6-dimethoxyphenyl)lithium at the first step was carried out and the structure of one of the intermediates, ketone 12, was established by X-ray crystallography. A new preparation of apoverbenone (2) has been developed.

  DOI：

  10.1021/jo00006a021