(3aR,7aR)-hexahydro-4,4,7a-trimethyl-1-indanone | 170081-07-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (3aR,7aR)-hexahydro-4,4,7a-trimethyl-1-indanone
• 英文别名: (3aR,7aR)-4,4,7a-trimethyl-2,3,3a,5,6,7-hexahydroinden-1-one
• CAS: 170081-07-9
• 化学式: C₁₂H₂₀O
• 分子量: 180.29
• InChiKey: TZRQPMUAQXFVNK-BXKDBHETSA-N

物化性质

• 沸点：
  241.7±8.0 °C(Predicted)
• 密度：
  0.947±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  13
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (3aR,7aR)-hexahydro-4,4,7a-trimethyl-1-indanone 在 cerium(III) chloride 、 camphor-10-sulfonic acid 作用下， 反应 0.83h， 生成 (2R,2'R,4'aR,5R,8'aR)-decahydro-2',5,5',5',8'a-pentamethyl-5-vinylspiro-2'-ol
  参考文献：
  名称：

  Stereocontrolled Synthesis of ent-Grindelic Acid. A Useful Example of Diastereofacial Guidance in an Oxonium Ion-Initiated Pinacolic Ring Expansion

  摘要：

  An enantioselective synthesis of (+)-grindelic acid is described, confirming that the dextrorotatory enantiomer is antipodal to the natural diterpenoid. The optically pure bicyclic ketone 5 representing the AB ring system is constructed from the levorotatory Wieland-Miescher ketone and must therefore possess the absolute configuration shown. Coupling of 5 with the 5-lithio derivative of optically active 2,3-dihydrofuran 3 derived from (R)-(-)-linalool was effected for the purpose of realizing acid-catalyzed rearrangement with generation of the appropriate spirocyclic framework. This key step is highly stereocontrolled, leading predominantly to 7. Once the advanced intermediate 15 is available in this fashion, its subsequent exposure to oxidation and dehydration steps led to the target molecule. The synthesis demonstrates unequivocally that natural (-)-grindelic acid is a true labdane diterpenoid.

  DOI：

  10.1021/jo960547p
• 作为产物：
  描述：

  (1R,2R)-2-(2-Carboxy-ethyl)-1,3,3-trimethyl-cyclohexanecarboxylic acid methyl ester 在 硫酸 、 sodium hexamethyldisilazane 、 lithium chloride 作用下， 以 四氢呋喃 、 水 、 二甲基亚砜 为溶剂， 反应 5.0h， 生成 (3aR,7aR)-hexahydro-4,4,7a-trimethyl-1-indanone
  参考文献：
  名称：

  Stereocontrolled Synthesis of ent-Grindelic Acid. A Useful Example of Diastereofacial Guidance in an Oxonium Ion-Initiated Pinacolic Ring Expansion

  摘要：

  An enantioselective synthesis of (+)-grindelic acid is described, confirming that the dextrorotatory enantiomer is antipodal to the natural diterpenoid. The optically pure bicyclic ketone 5 representing the AB ring system is constructed from the levorotatory Wieland-Miescher ketone and must therefore possess the absolute configuration shown. Coupling of 5 with the 5-lithio derivative of optically active 2,3-dihydrofuran 3 derived from (R)-(-)-linalool was effected for the purpose of realizing acid-catalyzed rearrangement with generation of the appropriate spirocyclic framework. This key step is highly stereocontrolled, leading predominantly to 7. Once the advanced intermediate 15 is available in this fashion, its subsequent exposure to oxidation and dehydration steps led to the target molecule. The synthesis demonstrates unequivocally that natural (-)-grindelic acid is a true labdane diterpenoid.

  DOI：

  10.1021/jo960547p

文献信息

• Total Synthesis of (−)-Chromodorolide B By a Computationally-Guided Radical Addition/Cyclization/Fragmentation Cascade
  作者：Daniel J. Tao、Yuriy Slutskyy、Mikko Muuronen、Alexander Le、Philipp Kohler、Larry E. Overman

  DOI：10.1021/jacs.7b13799

  日期：2018.2.28

  The first total synthesis of a chromodorolide marine diterpenoid is described. The core of the diterpenoid is constructed by a bimolecular radical addition/cyclization/fragmentation cascade that unites two complex fragments and forms two C-C bonds and four contiguous stereogenic centers of (-)-chromodorolide B in a single step. This coupling step is initiated by visible-light photocatalytic fragmentation

  描述了 chromodorolide 海洋二萜的首次全合成。二萜的核心是通过双分子自由基加成/环化/断裂级联反应构建的，该级联反应将两个复杂片段结合在一起，并在一个步骤中形成两个 CC 键和 (-)-chromodorolide B 的四个连续立体中心。该偶联步骤由氧化还原活性酯的可见光光催化裂解引发，可在铱或不太贵的富电子二氰基苯光催化剂存在下完成，并使用等摩尔量的两个加成物。计算研究指导了合成的这一核心步骤的发展，并提供了对观察到的立体选择性起源的深入了解。
• Total synthesis of (+)-grindelic acid by stereocontrolled oxonium ion activated pinacol ring expansion. Chemical proof of the absolute configuration of all grindelane diterpenes
  作者：Leo A. Paquette、Hui-Ling Wang

  DOI：10.1016/0040-4039(95)01187-m

  日期：1995.8

  (+)-Grindelic acid, synthesized enantioselectively from the levorotatory Wieland-Miescher ketone and (-)-linalool and necessarily formulated as 1a, is shown to be antipodal to the major diterpenoid of Grindelia species.

  (+)-Grindelic酸是由左旋Wieland-Miescher酮和（-)-香叶醇对映选择性合成而得，并必须以1a的形式配制，研究表明其对映于Grindelia属主要的倍半萜。
• Stereocontrolled Synthesis of <i>ent</i>-Grindelic Acid. A Useful Example of Diastereofacial Guidance in an Oxonium Ion-Initiated Pinacolic Ring Expansion
  作者：Leo A. Paquette、Hui-Ling Wang

  DOI：10.1021/jo960547p

  日期：1996.1.1

  An enantioselective synthesis of (+)-grindelic acid is described, confirming that the dextrorotatory enantiomer is antipodal to the natural diterpenoid. The optically pure bicyclic ketone 5 representing the AB ring system is constructed from the levorotatory Wieland-Miescher ketone and must therefore possess the absolute configuration shown. Coupling of 5 with the 5-lithio derivative of optically active 2,3-dihydrofuran 3 derived from (R)-(-)-linalool was effected for the purpose of realizing acid-catalyzed rearrangement with generation of the appropriate spirocyclic framework. This key step is highly stereocontrolled, leading predominantly to 7. Once the advanced intermediate 15 is available in this fashion, its subsequent exposure to oxidation and dehydration steps led to the target molecule. The synthesis demonstrates unequivocally that natural (-)-grindelic acid is a true labdane diterpenoid.