1-Ethenyl-4,4-dimethylcyclohex-2-en-1-ol | 423764-74-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-Ethenyl-4,4-dimethylcyclohex-2-en-1-ol
• CAS: 423764-74-3
• 化学式: C₁₀H₁₆O
• 分子量: 152.236
• InChiKey: QWFNQXJLKJWKAV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.28
• 重原子数：
  11.0
• 可旋转键数：
  1.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  20.23
• 氢给体数：
  1.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  1-Ethenyl-4,4-dimethylcyclohex-2-en-1-ol 在 4-二甲氨基吡啶 、 水 、 双(三甲基硅烷基)氨基钾 、 potassium carbonate 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 、 甲苯 为溶剂， 反应 74.0h， 生成 (4Z)-4-(4,4-dimethylcyclohex-2-en-1-ylidene)-2,2-dimethylbutanoic acid
  参考文献：
  名称：

  Intramolecularly Competitive Ireland-Claisen Rearrangements:  Scope and Potential Applications to Natural Product Synthesis

  摘要：

  A variety of bis-allylic esters were prepared by vinylmetal addition to cycloalkenones followed by esterification either in situ or in a separate operation. For chiral cyclohexenones, the vinyl additions generally occurred with > 10:1 diastereoselectivity. Although in some cases the bis-allylic esters proved to be sensitive to silica gel or other adsorbents, all of the esters examined could be isolated in acceptable purity. The Ireland-Claisen rearrangement of the bis-allylic esters occurred with complete regioselectivity via the exocyclic alkene. The alkene stereochemistry and the stereochemistry at C-2 and C-3 of the pentenoic acid products were consistent with a chairlike transition state in the rearrangement. Substituents at the carbons adjacent to the allylic carbinol carbon (i.e., C-2 or C-6 in cyclohexenone-derived substrates) directed the stereochemical course of the rearrangement. The rearrangements generally proceeded so as to place the larger of the C-2 or C-6 substituents in the pseudoequatorial position with respect to the chairlike transition state. For a bis-allylic ester bearing both a C-2-CH3 and a C-6-OMEM substituent, the rearrangement product resulted from the nominally smaller OMEM substituent occupying a pseudoequatorial position with respect to the chairlike transition state.

  DOI：

  10.1021/jo010752r
• 作为产物：
  描述：

  4,4-二甲基-2-环己基-1-酮 、 乙烯基溴化镁 以 四氢呋喃 、 乙醚 为溶剂， 以71%的产率得到1-Ethenyl-4,4-dimethylcyclohex-2-en-1-ol
  参考文献：
  名称：

  Intramolecularly Competitive Ireland-Claisen Rearrangements:  Scope and Potential Applications to Natural Product Synthesis

  摘要：

  A variety of bis-allylic esters were prepared by vinylmetal addition to cycloalkenones followed by esterification either in situ or in a separate operation. For chiral cyclohexenones, the vinyl additions generally occurred with > 10:1 diastereoselectivity. Although in some cases the bis-allylic esters proved to be sensitive to silica gel or other adsorbents, all of the esters examined could be isolated in acceptable purity. The Ireland-Claisen rearrangement of the bis-allylic esters occurred with complete regioselectivity via the exocyclic alkene. The alkene stereochemistry and the stereochemistry at C-2 and C-3 of the pentenoic acid products were consistent with a chairlike transition state in the rearrangement. Substituents at the carbons adjacent to the allylic carbinol carbon (i.e., C-2 or C-6 in cyclohexenone-derived substrates) directed the stereochemical course of the rearrangement. The rearrangements generally proceeded so as to place the larger of the C-2 or C-6 substituents in the pseudoequatorial position with respect to the chairlike transition state. For a bis-allylic ester bearing both a C-2-CH3 and a C-6-OMEM substituent, the rearrangement product resulted from the nominally smaller OMEM substituent occupying a pseudoequatorial position with respect to the chairlike transition state.

  DOI：

  10.1021/jo010752r

文献信息

• Conformational Biasing in 1,3-Oxidative Rearrangements of Dienols
  作者：George Majetich、Hisaya Nishide、Ryan M. Phillips、Jianhua Yu

  DOI：10.3987/com-07-s(w)62

  日期：——

  1-Vinyl-2-cycloalkenols are oxidized to form conjugated dienones in useful yields. Although this oxidative rearrangement is general, severe steric interactions can favor the formation of a conjugated dienal instead of a conjugated dienone. Several heterocyclic analogues were also studied.