Methyl 2-allyl-2-(3-trimethylsilylprop-2-ynyl)propanedioate | 159009-57-1

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: Methyl 2-allyl-2-(3-trimethylsilylprop-2-ynyl)propanedioate
• 英文别名: dimethyl 2-allyl-2-(3-(trimethylsilyl)prop-2-yn-1-yl)malonate；Dimethyl 2-prop-2-enyl-2-(3-trimethylsilylprop-2-ynyl)propanedioate
• CAS: 159009-57-1
• 化学式: C₁₄H₂₂O₄Si
• 分子量: 282.412
• InChiKey: CDGBXELAIHOUIX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.17
• 重原子数：
  19
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.57
• 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：

  Methyl 2-allyl-2-(3-trimethylsilylprop-2-ynyl)propanedioate 在 N,N-双(苯基亚甲基)-1,2-乙二胺 、 palladium diacetate 作用下， 以 氘代苯 为溶剂， 反应 13.5h， 以85%的产率得到Methyl 3-methylidene-4-trimethylsilylmethylenecyclopentan-1,1-dicarboxylate
  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：

  3-溴-1-三甲基硅基-1-丙炔 在 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 生成 Methyl 2-allyl-2-(3-trimethylsilylprop-2-ynyl)propanedioate
  参考文献：
  名称：

  钴（I）介导的烯炔的环异构化：机理的见解。

  摘要：

  [CpCo（CO）2]催化1，n-烯炔的环异构化，以高收率选择性提供五元和六元环系统。已经探索了控制环化的因素，我们发现该反应与钴（I）配合物的两个不同但互补的反应性相关。通过明智地选择烯炔的取代，也可能分离出由环戊烯钴产生的环丁烯

  DOI：

  10.1002/1521-3765(20010817)7:16<3517::aid-chem3517>3.0.co;2-v

文献信息

• Cobalt-Catalyzed Cycloisomerization of 1,6-Enynes and Allyl Propargyl Ethers
  作者：Alain Ajamian、James L. Gleason

  DOI：10.1021/ol034541f

  日期：2003.7.1

  6-Enynes and allyl propargyl ethers undergo a cobalt-catalyzed formal 5-endo-dig cyclization to form vinyl cyclopentenes and dihydrofurans, respectively. The use of equimolar amounts of dicobalt octacarbonyl and trimethyl phosphite affords optimum yields and improved selectivity for cycloisomerization vs alkene isomerization.

  [反应：见正文] 1，6-炔烃和烯丙基炔丙基醚经过钴催化的5-内位-dig环化反应分别形成乙烯基环戊烯和二氢呋喃。等摩尔量的八羰基二钴二亚磷酸酯和亚磷酸三甲酯可提供最佳收率，并提高环异构化与烯烃异构化的选择性。