(R)-Cyclopent-1-enyl-[(1S,2R,5S)-2-methyl-5-((R)-1-methyl-allyl)-cyclopentyl]-methanol | 134153-10-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: (R)-Cyclopent-1-enyl-[(1S,2R,5S)-2-methyl-5-((R)-1-methyl-allyl)-cyclopentyl]-methanol
• 英文别名: (R)-[(1S,2S,5R)-2-[(2R)-but-3-en-2-yl]-5-methylcyclopentyl]-(cyclopenten-1-yl)methanol
• CAS: 134153-10-9
• 化学式: C₁₆H₂₆O
• 分子量: 234.382
• InChiKey: KNGRSTKLCJJFQU-WOOFSFRISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.2
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  20.2
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  (1S*,2R*,5S*,6R*,9R*)-2-cyclopentenyl-5,9-dimethyl-3-oxa-4-oxobicyclo<4.3.0>nonane 在 二异丁基氢化铝 吡啶 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 6.0h， 生成 (R)-Cyclopent-1-enyl-[(1S,2R,5S)-2-methyl-5-((R)-1-methyl-allyl)-cyclopentyl]-methanol
  参考文献：
  名称：

  Alkylaluminum-catalyzed Claisen expansion reactions. Scope and stereochemistry

  摘要：

  The triisobutylaluminum-catalyzed Claisen rearrangement of a series of bicyclic allyl vinyl ethers was examined in connection with a planned synthesis of the diterpene epoxydictymene. The exocyclic vinyl ethers studied undergo [3,3] sigmatropy via chairlike transition states to provide products having Z stereochemistry about the double bond of the eight-membered ring. Differences appear only in the extent of stereoselectivity in the ensuing carbonyl reduction step. Two companion endocyclic vinyl ethers were found to utilize boat transition states to deliver Z products exclusively. In all cases, the level of chirality transfer is excellent. An analysis is presented showing that the relative configurations of the newly generated stereogenic centers, established in several key examples by X-ray crystallography, follow directly from the boat-chair options, both of which have the latent ability to be influenced catalytically by (i-Bu)3Al.

  DOI：

  10.1021/jo00012a014

文献信息

• PAQUETTE, LEO A.;FRIEDRICH, DIRK;ROGERS, ROBIN D., J. ORG. CHEM., 56,(1991) N2, C. 3841-3849
  作者：PAQUETTE, LEO A.、FRIEDRICH, DIRK、ROGERS, ROBIN D.

  DOI：——

  日期：——