(E)-dodec-1-en-11-yn-1-ylbenzene | 194865-48-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (E)-dodec-1-en-11-yn-1-ylbenzene
• 英文别名: [(E)-dodec-1-en-11-ynyl]benzene
• CAS: 194865-48-0
• 化学式: C₁₈H₂₄
• 分子量: 240.389
• InChiKey: SQOLZMVJOOHOGR-NTCAYCPXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.7
• 重原子数：
  18
• 可旋转键数：
  9
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  (E)-dodec-1-en-11-yn-1-ylbenzene 在 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 反应 3.0h， 以67%的产率得到11,12-epoxy-12-phenyl-2-dodecyne
  参考文献：
  名称：

  Palladium-Catalyzed Isomerization of Aryl-Substituted Epoxides:  A Selective Synthesis of Substituted Benzylic Aldehydes and Ketones

  摘要：

  Aryl-substituted epoxides bearing multiple methyl substituents on the epoxide ring isomerize in the presence of 5 mol % Pd(OAc)(2)PR3 (R = n-Bu, Ph) to form the corresponding benzylic aldehyde or ketone, with complete regioselectivity for the carbonyl compound formed via cleavage of the benzylic C-O bond. No allylic alcohols or products arising from alkyl migration are observed. Rapid reaction rates and nearly quantitative yields are obtained, even with highly sterically hindered epoxides, using tri-n-butylphosphine as ligand and tert-butyl alcohol as solvent. 2-Aryl-substituted epoxides with two methyl substituents on C3 are completely unreactive, consistent with an oxidative addition/beta-hydride elimination mechanism. Catalyst variation studies show that both Pd(OAc)(2) and PR3 are essential for optimal activity and that palladium catalysts formed in this manner are superior to other Pd(O) catalysts (e.g., Pd(PPh3)(4)). The reactivity of catalytic Pd(OAc)(2)/PR3 toward multiply-substituted epoxides is compared to traditional Lewis acid catalysts; the former is found to be much more selective for isomerization without skeletal rearrangement. A mechanistic rationale involving turnover-limiting S(N)2-like attack of Pd(O) at the benzylic carbon is proposed.

  DOI：

  10.1021/jo970743b
• 作为产物：
  描述：

  10-十一烯醛 在 sodium hydroxide 、 正丁基锂 、 硼烷四氢呋喃络合物 、 磷酸 、 Celite 、 双氧水 、 三苯基膦 、 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 、 二氯甲烷 为溶剂， 反应 51.0h， 生成 (E)-dodec-1-en-11-yn-1-ylbenzene
  参考文献：
  名称：

  Palladium-Catalyzed Isomerization of Aryl-Substituted Epoxides:  A Selective Synthesis of Substituted Benzylic Aldehydes and Ketones

  摘要：

  Aryl-substituted epoxides bearing multiple methyl substituents on the epoxide ring isomerize in the presence of 5 mol % Pd(OAc)(2)PR3 (R = n-Bu, Ph) to form the corresponding benzylic aldehyde or ketone, with complete regioselectivity for the carbonyl compound formed via cleavage of the benzylic C-O bond. No allylic alcohols or products arising from alkyl migration are observed. Rapid reaction rates and nearly quantitative yields are obtained, even with highly sterically hindered epoxides, using tri-n-butylphosphine as ligand and tert-butyl alcohol as solvent. 2-Aryl-substituted epoxides with two methyl substituents on C3 are completely unreactive, consistent with an oxidative addition/beta-hydride elimination mechanism. Catalyst variation studies show that both Pd(OAc)(2) and PR3 are essential for optimal activity and that palladium catalysts formed in this manner are superior to other Pd(O) catalysts (e.g., Pd(PPh3)(4)). The reactivity of catalytic Pd(OAc)(2)/PR3 toward multiply-substituted epoxides is compared to traditional Lewis acid catalysts; the former is found to be much more selective for isomerization without skeletal rearrangement. A mechanistic rationale involving turnover-limiting S(N)2-like attack of Pd(O) at the benzylic carbon is proposed.

  DOI：

  10.1021/jo970743b

文献信息

• Photo-induced Decarboxylative Heck-Type Coupling of Unactivated Aliphatic Acids and Terminal Alkenes in the Absence of Sacrificial Hydrogen Acceptors
  作者：Hui Cao、Heming Jiang、Hongyu Feng、Jeric Mun Chung Kwan、Xiaogang Liu、Jie Wu

  DOI：10.1021/jacs.8b11218

  日期：2018.11.28

  boronates are among the most versatile building blocks that can be found in every sector of chemical science. We herein report a noble-metal-free method of accessing such olefins through a photo-induced decarboxylative Heck-type coupling using alkyl carboxylic acids, one of the most ubiquitous building blocks, as the feedstocks. This transformation was achieved in the absence of external oxidants through

  1,2-二取代的烯烃，如乙烯基芳烃、乙烯基硅烷和乙烯基硼酸酯，是化学科学各个领域中最通用的结构单元。我们在此报告了一种无贵金属的方法，该方法使用烷基羧酸（最普遍的结构单元之一）作为原料，通过光诱导脱羧 Heck 型偶联获得此类烯烃。这种转变是在没有外部氧化剂的情况下通过有机光氧化还原催化剂和钴肟催化剂的协同组合实现的，H2 和 CO2 作为唯一的副产物。控制实验和 DFT 计算都支持基于自由基的机制，最终导致开发出脂肪族羧酸、丙烯酸酯和乙烯基芳烃的选择性三组分偶联。
• Palladium-Catalyzed Isomerization of Aryl-Substituted Epoxides:  A Selective Synthesis of Substituted Benzylic Aldehydes and Ketones
  作者：Sanjitha Kulasegaram、Robert J. Kulawiec

  DOI：10.1021/jo970743b

  日期：1997.9.1

  Aryl-substituted epoxides bearing multiple methyl substituents on the epoxide ring isomerize in the presence of 5 mol % Pd(OAc)(2)PR3 (R = n-Bu, Ph) to form the corresponding benzylic aldehyde or ketone, with complete regioselectivity for the carbonyl compound formed via cleavage of the benzylic C-O bond. No allylic alcohols or products arising from alkyl migration are observed. Rapid reaction rates and nearly quantitative yields are obtained, even with highly sterically hindered epoxides, using tri-n-butylphosphine as ligand and tert-butyl alcohol as solvent. 2-Aryl-substituted epoxides with two methyl substituents on C3 are completely unreactive, consistent with an oxidative addition/beta-hydride elimination mechanism. Catalyst variation studies show that both Pd(OAc)(2) and PR3 are essential for optimal activity and that palladium catalysts formed in this manner are superior to other Pd(O) catalysts (e.g., Pd(PPh3)(4)). The reactivity of catalytic Pd(OAc)(2)/PR3 toward multiply-substituted epoxides is compared to traditional Lewis acid catalysts; the former is found to be much more selective for isomerization without skeletal rearrangement. A mechanistic rationale involving turnover-limiting S(N)2-like attack of Pd(O) at the benzylic carbon is proposed.