(+/-)-mesembranol | 82769-19-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯烷类
• 英文名称: (+/-)-mesembranol
• 英文别名: (+/-)-3a-(3,4-dimethoxy-phenyl)-1-methyl-(3ar,7ac)-octahydro-indol-6c-ol；(3aR,6S,7aR)-3a-(3,4-dimethoxyphenyl)-1-methyl-3,4,5,6,7,7a-hexahydro-2H-indol-6-ol
• CAS: 82769-19-5
• 化学式: C₁₇H₂₅NO₃
• 分子量: 291.39
• InChiKey: KPMLOZVRLWHOBN-IAOVAPTHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.65
• 拓扑面积：
  41.9
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (+/-)-mesembranol 在 sodium tetrahydroborate 、 jones reagent 作用下， 以 甲醇 、 丙酮 为溶剂， 反应 1.17h， 生成 (+/-)-6-epimesembranol
  参考文献：
  名称：

  Radical cyclization of N-(cyclohex-2-enyl)-.alpha.,.alpha.-dichloroacetamides. Stereoselective syntheses of (.+-.)-mesembranol and (.+-.)-elwesine

  摘要：

  Stereoselective syntheses of the Sceletium alkaloid (+/-)-mesembranol (2) and the Amaryllidaceae alkaloid (+/-)-elwesine (3) have been achieved. A key step in the syntheses involves the Bu3SnH-mediated radical cyclization of the dichloroacetamides 34 and 46, which provides the cis-3a-aryloctahydroindolones 36 and 47, respectively. The amides 34 and 46 were prepared in a highly stereocontrolled manner from the corresponding 1-arylcyclohexenes 29 and 41 along the lines: 29 --> 30a --> 31 --> 32 --> 33 --> 34 and 41 --> 42a --> 44a --> 45a --> 46. Transformation of 36 into (+/-)-mesembranol was readily accomplished by reduction with diborane and subsequent removal of the O-benzyl protecting group by hydrogenolysis over Pd/C. On the other hand, debenzylation of 36 with Raney Ni afforded a mixture of the 6-alpha- and 6-beta-alcohols 39a and 39b, which was then reduced by alane to give a separable mixture of (+/-)-mesembranol and (+/-)-6-epimesembranol (40). Reduction of 47 with diborane followed by catalytic hydrogenolysis over Pd/C afforded the amino alcohol 50, which has already been converted into (+/-)-elwesine by Pictet-Spengler cyclization.

  DOI：

  10.1021/jo00001a021
• 作为产物：
  描述：

  4-(苄氧基)环己酮 在 palladium on activated charcoal 盐酸 、 N-溴代丁二酰亚胺(NBS) 、 硼烷四氢呋喃络合物 、 偶氮二异丁腈 、 水 、 氢气 、 三正丁基氢锡 、 对甲苯磺酸 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 乙醇 、 二氯甲烷 、 甲苯 、 乙腈 、 苯 为溶剂， 25.0~100.0 ℃ 、392.24 kPa 条件下， 反应 35.0h， 生成 (+/-)-mesembranol
  参考文献：
  名称：

  Radical cyclization of N-(cyclohex-2-enyl)-.alpha.,.alpha.-dichloroacetamides. Stereoselective syntheses of (.+-.)-mesembranol and (.+-.)-elwesine

  摘要：

  Stereoselective syntheses of the Sceletium alkaloid (+/-)-mesembranol (2) and the Amaryllidaceae alkaloid (+/-)-elwesine (3) have been achieved. A key step in the syntheses involves the Bu3SnH-mediated radical cyclization of the dichloroacetamides 34 and 46, which provides the cis-3a-aryloctahydroindolones 36 and 47, respectively. The amides 34 and 46 were prepared in a highly stereocontrolled manner from the corresponding 1-arylcyclohexenes 29 and 41 along the lines: 29 --> 30a --> 31 --> 32 --> 33 --> 34 and 41 --> 42a --> 44a --> 45a --> 46. Transformation of 36 into (+/-)-mesembranol was readily accomplished by reduction with diborane and subsequent removal of the O-benzyl protecting group by hydrogenolysis over Pd/C. On the other hand, debenzylation of 36 with Raney Ni afforded a mixture of the 6-alpha- and 6-beta-alcohols 39a and 39b, which was then reduced by alane to give a separable mixture of (+/-)-mesembranol and (+/-)-6-epimesembranol (40). Reduction of 47 with diborane followed by catalytic hydrogenolysis over Pd/C afforded the amino alcohol 50, which has already been converted into (+/-)-elwesine by Pictet-Spengler cyclization.

  DOI：

  10.1021/jo00001a021

文献信息

• Double Reduction of Cyclic Aromatic Sulfonamides: Synthesis of (+)-Mesembrine and (+)-Mesembranol
  作者：Kimberly Geoghegan、Paul Evans

  DOI：10.1021/jo4000306

  日期：2013.4.5

  (+)-mesembrine (1) and (+)-mesembranol (2) has been achieved from the monoterpene (S)-(−)-perillyl alcohol. Key transformations include a diastereo- and regioselective Pd-mediated intramolecular Heck reaction, and a double reduction of the resultant cyclic sulfonamide, to afford the cis-3a-aryloctahydroindole skeleton.

  从单萜（S）-（-）-紫苏子醇已经实现了（+）-中间膜（1）和（+）-中间膜醇（2）的合成。关键的转化包括非对映和区域选择性的Pd介导的分子内Heck反应，以及所得环磺酰胺的两次还原，以提供顺式-3a-芳基氢化吲哚骨架。
• Synthesis of (±)-mesembranol by radical cyclisation of α,α-dichloroacetamides
  作者：Hiroyuki Ishibashi、Taru Su So、Tatsunori Sato、Katsuko Kuroda、Masazumi Ikeda

  DOI：10.1039/c39890000762

  日期：——

  (±)-Mesembranol was synthesised in a highly stereoselective manner using Bu3SnH mediated radical cyclisation of α,α-dichloroacetamide as the key step.

  以Bu 3 SnH介导的α，α-二氯乙酰胺自由基环化为关键步骤，以高度立体选择性的方式合成了（±）-Mesembranol 。
• Sceletium alkaloids. Part 12. Synthesis of (.+-.)-mesembranol and (.+-.)-O-methyljoubertiamine. Aza-ring expansion of cis-bicyclo[4.2.0]octanones
  作者：Peter W. Jeffs、Nicholas A. Cortese、Joachim Wolfram

  DOI：10.1021/jo00141a015

  日期：1982.9
• ISHIBASHI, HIROYUKI;SO, TARU SO;OKOCHI, KYOKO;SATO, TATSUNORI;NAKAMURA, N+, J. ORG. CHEM., 56,(1991) N, C. 95-102
  作者：ISHIBASHI, HIROYUKI、SO, TARU SO、OKOCHI, KYOKO、SATO, TATSUNORI、NAKAMURA, N+

  DOI：——

  日期：——
• Über die Alkaloide von Mesembryanthemum tortuosum L.
  作者：K. Bodendorf、Werner Krieger

  DOI：10.1002/ardp.19572901002

  日期：——