(E)-dimethyl 3-(cyclohexylmethylene)-4-methylenecyclopentane-1,1-dicarboxylate | 95124-00-8

• 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: (E)-dimethyl 3-(cyclohexylmethylene)-4-methylenecyclopentane-1,1-dicarboxylate
• 英文别名: 4,4-bis(methoxycarbonyl)-2-methylene-1-(cyclohexylmethylidene)cyclopentane；(E)-1-(cyclohexylmethylidene)-2-methylene-4,4-dicarbomethoxycyclopentane；dimethyl (3E)-3-(cyclohexylmethylidene)-4-methylidenecyclopentane-1,1-dicarboxylate
• CAS: 95124-00-8
• 化学式: C₁₇H₂₄O₄
• 分子量: 292.375
• InChiKey: NVRLPALFOCUMTL-NTEUORMPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 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

• 作为反应物：
  描述：

  马来酸酐 、 (E)-dimethyl 3-(cyclohexylmethylene)-4-methylenecyclopentane-1,1-dicarboxylate 在 苯磺酰胺 作用下， 以 甲苯 为溶剂， 反应 4.0h， 以55%的产率得到6,6-dicarbomethoxy-4α-cyclohexyl-1,3-dioxo-1,3aβ,4,5,6,7,8,8aβ-octahydroindeno<5,6-c>furan
  参考文献：
  名称：

  Pd-Catalyzed Cycloisomerization to 1,2- Dialkylidenecycloalkanes. 1

  摘要：

  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.

  DOI：

  10.1021/ja00089a015
• 作为产物：
  描述：

  炔丙基丙二酸二甲酯 在 [Pd(OAc)2(PPh₃)2] 、 钯 sodium hydride 、 三苯基膦 作用下， 以 四氢呋喃 、 氘代苯 为溶剂， 反应 16.0h， 生成 (E)-dimethyl 3-(cyclohexylmethylene)-4-methylenecyclopentane-1,1-dicarboxylate
  参考文献：
  名称：

  Cyclization via isomerization: a palladium(2+)-catalyzed carbocyclization of 1,6-enynes to 1,3- and 1,4-dienes

  摘要：

  DOI：

  10.1021/ja00292a065

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。
• Pd-Catalyzed Cycloisomerization to 1,2-Dialkylidenecycloalkanes. 2. Alternative Catalyst System
  作者：Barry M. Trost、Donna L. Romero、Frode Rise

  DOI：10.1021/ja00089a016

  日期：1994.5

  The mechanisms by which palladium complexes may catalyze the cycloisomerization of 1,6- and 1,7-enynes to dialkylidenecycloalkanes were probed by exploring a catalyst system different than a ligated palladium acetate which previously has proven to be successful. Although carboxylic acids showed no discernible interaction with palladium(0) complexes, this combination proved to be a powerful catalyst system to effect this cycloisomerization. The fact that the two catalyst systems do not have the same reactivity profile suggests this new catalyst system may operate by a different mechanism. Evidence supporting a pathway invoking formation of a hydridopalladium acetate followed by hydropalladation as initiation is presented. Steric and electronic effects direct the regioselectivity of the termination step to form either 1,3- or 1,4-diene products. The 1,3-diene products participate exceedingly well in Diels-Alder reactions, both inter- and intramolecularly. The presence of an oxygen substituent at the position allylic to the diene served as both a regiochemical control element for the palladium-catalyzed cycloisomerization and a diastereochemical control element for the Diels-Alder reaction. The net result of these two steps, the first of which is a catalyzed isomerization and the second an addition, is a highly efficient approach to complex polycycles in terms of both selectivity and atom economy.
• TROST, BARRY M.;LEE, DONNA C.;RISE, FRODE, TETRAHEDRON LETT., 30,(1989) N, C. 651-654
  作者：TROST, BARRY M.、LEE, DONNA C.、RISE, FRODE

  DOI：——

  日期：——
• TROST, B. M.;LAUTENS, M., J. AMER. CHEM. SOC., 1985, 107, N 6, 1781-1783
  作者：TROST, B. M.、LAUTENS, M.

  DOI：——

  日期：——