trans-4-tert-Butyl-2-(2-propenyl)cyclohexanone | 15781-18-7

• 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: trans-4-tert-Butyl-2-(2-propenyl)cyclohexanone
• 英文别名: (2S,4R)-4-tert-butyl-2-prop-2-enylcyclohexan-1-one
• CAS: 15781-18-7
• 化学式: C₁₃H₂₂O
• 分子量: 194.317
• InChiKey: ISONXJGBQIJAEM-WDEREUQCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  4-叔丁基环己酮N,N-二甲基腙 在 sodium periodate 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 水 为溶剂， 反应 40.5h， 生成 trans-4-tert-Butyl-2-(2-propenyl)cyclohexanone
  参考文献：
  名称：

  Neighboring group participation in Lewis acid-promoted [3 + 4] and [3 + 5] annulations. The stereocontrolled synthesis of tricyclic ethers

  摘要：

  A variety of 1,4- and 1,5-keto aldehydes derived from cycloalkanes are coupled with the bis(trimethylsilyl) enol ether of methyl acetoacetate in the presence of either TMSOTf or TrSbCl6 to generate tricyclic ethers. The reactions proceed with excellent regiochemical control by a mechanism involving neighboring group participation. This mechanism involves initial formation of a bicyclic oxocarbenium ion intermediate from the keto aldehyde substrates. The geometries of selected bicyclic intermediates have been optimized using the AM1 method allowing successful prediction of the stereochemical outcomes in the cyclization in most cases. Epimerization of alpha-chiral keto aldehyde substrates does not appear to occur in these Lewis acid-promoted annulation reactions.

  DOI：

  10.1021/jo00074a018

文献信息

• Mild and chemoselective catalytic deprotection of ketals and acetals using cerium(IV) ammonium nitrate
  作者：Ali Ates、Arnaud Gautier、Bernard Leroy、Jean-Marc Plancher、Yannick Quesnel、Jean-Christophe Vanherck、István E Markó

  DOI：10.1016/j.tet.2003.03.002

  日期：2003.11

  Cerium(IV) ammonium nitrate (CAN) is a powerful, though mild, reagent for the efficient and selective removal of a range of ketals and acetals. This novel deprotection method requires only catalytic amounts of CAN and tolerates a variety of functional and protecting groups. Mechanistic insights suggest that the Ce(IV) salts act as unique Lewis acids and not as redox active species.

  硝酸铈（IV）铵（CAN）是一种功能强大的试剂，尽管温和，但可以有效，选择性地去除一系列缩酮和乙缩醛。这种新颖的脱保护方法仅需要催化量的CAN，并能耐受各种功能和保护基团。机械学的见解表明，Ce（IV）盐起独特的路易斯酸的作用，而不是氧化还原活性物质。
• Radical .alpha.-allylation of alkyl-substituted .alpha.-(phenylseleno)cycloalkanones
  作者：Takeshi Toru、Tatsuya Okumura、Yoshio Ueno

  DOI：10.1021/jo00291a033

  日期：1990.2