(Z)-triethyl(4-methylpent-1-en-1-yl)silane | 1346254-24-7

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: (Z)-triethyl(4-methylpent-1-en-1-yl)silane
• 英文别名: triethyl-[(Z)-4-methylpent-1-enyl]silane
• CAS: 1346254-24-7
• 化学式: C₁₂H₂₆Si
• 分子量: 198.424
• InChiKey: AXADSCSDBAEVCR-LUAWRHEFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.64
• 重原子数：
  13
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.83
• 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：

  (Z)-triethyl(4-methylpent-1-en-1-yl)silane 、 溶剂黄146 在 palladium diacetate 、 对苯醌 作用下， 反应 24.0h， 以53%的产率得到(E)-4-methyl-1-(triethylsilyl)pent-1-en-3-yl acetate
  参考文献：
  名称：

  Oxidant-Controlled Stereoselectivity in the Pd-Catalyzed Allylic Oxidation of cis-Vinylsilanes

  摘要：

  The allylic oxidation of cis-vinylsilanes is reported. The reaction requires a low catalyst loading of Pd(OAc)(2) without the need for an external ligand. Interestingly, trans-vinylsilanes are unreactive, whereas allylic oxidations of cis-vinylsilanes proceed in good yields giving a single diastereo- and regioisomer of the branched allylic acetate trans-vinylsilane when benzoquinone is employed. The use of PhI(OAc)(2) as oxidant in place of benzoquinone provides the branched, cis-vinylsilane as the major product. Additionally, the first intramolecular allylic C-H etherifications of cis-vinylsilanes to give oxygen heterocycles are also described.

  DOI：

  10.1021/ja2089102
• 作为产物：
  描述：

  三乙基硅烷 、 4-甲基-1-戊炔 在 二氯乙基铝 、 三乙胺 作用下， 以 正己烷 、 甲苯 为溶剂， 反应 1.75h， 以73%的产率得到(Z)-triethyl(4-methylpent-1-en-1-yl)silane
  参考文献：
  名称：

  Oxidant-Controlled Stereoselectivity in the Pd-Catalyzed Allylic Oxidation of cis-Vinylsilanes

  摘要：

  The allylic oxidation of cis-vinylsilanes is reported. The reaction requires a low catalyst loading of Pd(OAc)(2) without the need for an external ligand. Interestingly, trans-vinylsilanes are unreactive, whereas allylic oxidations of cis-vinylsilanes proceed in good yields giving a single diastereo- and regioisomer of the branched allylic acetate trans-vinylsilane when benzoquinone is employed. The use of PhI(OAc)(2) as oxidant in place of benzoquinone provides the branched, cis-vinylsilane as the major product. Additionally, the first intramolecular allylic C-H etherifications of cis-vinylsilanes to give oxygen heterocycles are also described.

  DOI：

  10.1021/ja2089102

文献信息

• Experimental and Computational Studies of the Ruthenium-Catalyzed Hydrosilylation of Alkynes: Mechanistic Insights into the Regio- and Stereoselective Formation of Vinylsilanes
  作者：Ruili Gao、Dale R. Pahls、Thomas R. Cundari、Chae S. Yi

  DOI：10.1021/om501019j

  日期：2014.12.8

  regio- and stereoselective hydrosilylation of alkynes to form vinylsilane products. (Z)-Vinylsilane products were selectively formed for sterically nondemanding terminal alkynes, while (E)-vinylsilane products resulted from sterically demanding terminal alkynes. Kinetic data were obtained from the hydrosilylation of phenylacetylene. The phosphine inhibition study showed an uncompetitive Michaelis–Menten

  氢化钌络合物（PCy 3）2（CO）RuHCl被发现是炔烃区域和立体选择性氢化硅烷化形成乙烯基硅烷产物的高效催化剂。（Z）-乙烯基硅烷产物是选择性形成的，用于空间上不要求的末端炔烃，而（E）-乙烯基硅烷产物是由空间上需要的末端炔烃产生的。动力学数据是从苯乙炔的氢化硅烷化获得的。磷化氢的抑制作用研究表明，Michaelis-Menten的抑制动力学没有竞争性。经验率定律率= k obs [ 1 ] 1 [炔烃] 0 [硅烷] 0根据[炔烃]和[硅烷]两者的函数，确定反应速率。进行了DFT计算，发现通过金属-环丙烯过渡态Z / E异构化很容易，并且异构化发生在与硅烷底物结合之前。在实验和计算数据的基础上，描述了有关氢化硅烷化反应的详细机理。