<<4,4-bis(methoxycarbonyl)-1-methylene-2-cyclopentyl>methylidene>cyclohexane | 131130-43-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: <<4,4-bis(methoxycarbonyl)-1-methylene-2-cyclopentyl>methylidene>cyclohexane
• 英文别名: (4,4-bis(methoxycarbonyl)-2-methylenecyclopentyl)methylenecyclohexane；dimethyl 3-(cyclohexylidenemethyl)-4-methylenecyclopentane-1,1-dicarboxylate；Dimethyl 3-(cyclohexylidenemethyl)-4-methylidenecyclopentane-1,1-dicarboxylate
• CAS: 131130-43-3
• 化学式: C₁₇H₂₄O₄
• 分子量: 292.375
• InChiKey: QDKPKGVJEBOYBX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  21
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.65
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  炔丙基丙二酸二甲酯 在 四(三苯基膦)钯 N,O-双三甲硅基乙酰胺 、 cyclopentadienylruthenium(II) trisacetonitrile hexafluorophosphate 、 sodium hydride 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 反应 12.0h， 生成 <<4,4-bis(methoxycarbonyl)-1-methylene-2-cyclopentyl>methylidene>cyclohexane
  参考文献：
  名称：

  CpRu(CH3CN)3PF6催化的烯炔环异构化中的机械二分法

  摘要：

  由于炔烃的丰富化学性质，炔烃很容易获得结构单元，因此是形成环的有吸引力的底物。用于环异构化的钌催化剂通常在室温下在丙酮或 DMF 中在中性条件下实现 1,6- 和 1,7- 烯炔的此类反应。该反应可有效形成具有广泛发散结构的五元和六元环。炔烃可以带有供选和退选取代基。烯烃可以是二或三取代的。然而，在炔酸的炔丙基位置引入四元中心完全改变了反应的性质。在 1,6-烯酸酯的情况下，在同样温和的条件下以优异的产率形成七元环。提供的证据表明机制发生了完全变化。在前一种情况下，反应涉及钌环戊烯的中间体。在后一种情况下，提出了一个 CH 插入以形成 π-烯丙基钌中间体，并且...

  DOI：

  10.1021/ja012450c

文献信息

• Catalytic Cycloisomerization of Enynes by Using a Nickel-Zinc-Acid System
  作者：Shin-ichi Ikeda、Natsuko Daimon、Reiko Sanuki、Kazunori Odashima

  DOI：10.1002/chem.200500894

  日期：2006.2.8

  Catalytic cycloisomerization of enynes has been accomplished in the presence of an Ni0-PPh3-Zn-carboxylic acid or -ZnCl2 system. A nickel(I)-hydride complex, thought to be generated by reduction of the protonated nickel(II) complex with Zn, is proposed as the catalytic species. This cycloisomerization shows reactivity behavior that is different from that of a conventional metal-catalyzed reaction. In particular

  在Ni0-PPh3-Zn-羧酸或-ZnCl2系统的存在下，实现了炔烃的催化环异构化。镍（I）-氢化物络合物被认为是催化物质，认为该氢化物是通过将质子化的镍（II）络合物与锌还原而生成的。该环异构化显示出与常规金属催化反应不同的反应性行为。特别地，在与（E）-烯炔的反应中，催化体系具有比1,4-二烯更有利于形成1,3-二烯的选择性。此外，该催化体系已被用于二烯的多米诺环化反应，以构建三环化合物。
• Ruthenium-Catalyzed Cycloisomerizations of 1,6- and 1,7-Enynes
  作者：Barry M. Trost、F. Dean Toste

  DOI：10.1021/ja993401r

  日期：2000.2.1
• Pd-Catalyzed Cycloisomerization to 1,2- Dialkylidenecycloalkanes. 1
  作者：Barry M. Trost、Gerald J. Tanoury、Mark Lautens、Chuen Chan、David T. MacPherson

  DOI：10.1021/ja00089a015

  日期：1994.5

  Enhancing synthetic efficiency requires the development of synthetic reactions that, to the extent possible, are simple additions wherein everything else is required only in catalytic amounts. The Alder ene reaction constitutes a classical reaction that meets this requirement that has much unrealized potential. A transition-metal-catalyzed version helps to increase that potential by permitting this reaction to proceed under mild conditions. A significant benefit of transition metal catalysis is the feasibility of diverting the reaction along pathways not feasible under thermal conditions. The synthesis of 1,3-dienes rather than 1,4-dienes is a very important diversion because of the utility of 1,3-dienes as reaction partners in the Diels-Alder reaction, another highly atom economical process. A catalyst derived from palladium acetate cycloisomerizes 1,6- and 1,7-enynes to dialkylidenecyclopentanes and -cyclohexanes. 1,3-Diene formation is favored over the Alder ene process by both steric and electronic effects. The reaction is highly chemoselective-tolerating a wide diversity of functionality including hydroxyl groups, ketones, esters, alkynyl and enol ethers, alkynyl and vinyl silanes, and enones. Many of the substrates are available by palladium-catalyzed alkylation reactions-highlighting the effectiveness of palladium catalyzed methodology in organic synthesis. The atom-economical nature of these reactions combined with the Diels-Alder reaction permit butadiene and dimethyl propargylmalonate to be molded into a polyhydro-as-indacene. The mechanism of this reaction may involve a tautomerization of an enyne-Pd(+2) complex to a pallada(+4)cyclopentene intermediate as a key step.
• Trost, Barry M.; Lautens; Chan, Journal of the American Chemical Society, 1991, vol. 113, # 2, p. 636 - 644
  作者：Trost, Barry M.、Lautens、Chan、Jebaratnam、Mueller

  DOI：——

  日期：——
• TROST, BARRY M.;LAUTENS, M.;CHAN, C.;JEBARATNAM, D. J.;MUELLER, T., J. AMER. CHEM. SOC., 113,(1991) N, C. 636-644
  作者：TROST, BARRY M.、LAUTENS, M.、CHAN, C.、JEBARATNAM, D. J.、MUELLER, T.

  DOI：——

  日期：——