(Z)-[2,3-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-allyl]triphenylsilane | 1325764-05-3

• 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)-[2,3-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-allyl]triphenylsilane
• 英文别名: [(Z)-2,3-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)prop-2-enyl]-triphenylsilane
• CAS: 1325764-05-3
• 化学式: C₃₃H₄₂B₂O₄Si
• 分子量: 552.402
• InChiKey: NHOUBLHBAUROKV-SHHOIMCASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.35
• 重原子数：
  40
• 可旋转键数：
  7
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.39
• 拓扑面积：
  36.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  烯丙基三苯基硅烷 、 联硼酸频那醇酯 在 (CH₃Si(C₆H₃(CF₃)P(C₆H₃(CF₃)2)2)2)Pd(SO₃CF₃) AlEt₃ 作用下， 以 甲苯 为溶剂， 以80%的产率得到(Z)-[2,3-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-allyl]triphenylsilane
  参考文献：
  名称：

  通过新型 PSiP-Pincer 钯催化脱氢硼酸化反应从烯烃和二硼有效合成二硼基烯烃

  摘要：

  首次实现了以烯烃和二硼为原料高效合成1,1-、反式-1,2-和环状1,2-二硼基烯烃等多种二硼基烯烃。Selective preparation of di- and monoborylalkenes was also realized by the appropriate choice of reaction conditions. 发现该反应通过一种新的脱氢硼化机制进行，以带有阴离子PSiP-钳状配体的单硼基钯配合物为关键中间体，实现了有效的硼化而不牺牲烯烃的硼氢化或氢化。

  DOI：

  10.1021/ja205186k

文献信息

• Efficient Synthesis of Diborylalkenes from Alkenes and Diboron by a New PSiP-Pincer Palladium-Catalyzed Dehydrogenative Borylation
  作者：Jun Takaya、Naohiro Kirai、Nobuharu Iwasawa

  DOI：10.1021/ja205186k

  日期：2011.8.24

  as 1,1-, trans-1,2-, and cyclic 1,2-diborylalkenes from alkenes and diboron was achieved for the first time. Selective preparation of di- and monoborylalkenes was also realized by the appropriate choice of reaction conditions. The reaction was found to proceed via a new mechanism of dehydrogenative borylation through a monoborylpalladium complex bearing an anionic PSiP-pincer ligand as a key intermediate

  首次实现了以烯烃和二硼为原料高效合成1,1-、反式-1,2-和环状1,2-二硼基烯烃等多种二硼基烯烃。Selective preparation of di- and monoborylalkenes was also realized by the appropriate choice of reaction conditions. 发现该反应通过一种新的脱氢硼化机制进行，以带有阴离子PSiP-钳状配体的单硼基钯配合物为关键中间体，实现了有效的硼化而不牺牲烯烃的硼氢化或氢化。
• PSiP-Pincer Type Palladium-Catalyzed Dehydrogenative Borylation of Alkenes and 1,3-Dienes
  作者：Naohiro Kirai、Shoichiro Iguchi、Tatsuyoshi Ito、Jun Takaya、Nobuharu Iwasawa

  DOI：10.1246/bcsj.20130004

  日期：2013.7.15

  Dehydrogenative borylation of alkenes and 1,3-dienes was realized by carrying out the reaction in the presence of bis(pinacolato)diboron (B2pin2) and a catalytic amount of PSiP-pincer palladium complex. This protocol has the following notable features. 1) Monoanionic nature of the PSiP-pincer ligand prevents the formation of boryl(hydrido)- or dihydridopalladium species, enabling synthesis of various vinyl- or dienylboronic esters in good yield from a 1:1 mixture of B2pin2 and alkenes or 1,3-dienes without forming hydroboration or hydrogenation products. 2) Due to the strong trans influence of the silicon atom, PSiP-pincer palladium complex showed high activity toward migratory insertion. 3) Suppression of these side-reactions and the high reactivity of the PSiP-pincer palladium complex enabled an efficient, successive dehydrogenative borylation to give 1,1- or 1,2-diborylated products depending on the kind of substituent on alkenes by using more than 2 equivalents of B2pin2. Mechanistic study revealed that PSiP-pincer borylpalladium complex was generated from hydridopalladium complex and B2pin2, and this complex underwent alkene insertion followed by β-hydride elimination to give alkenylboronic ester with regeneration of the hydridopalladium complex.

  通过在双(频哪醇)二硼(B2pin2)和催化量的PSiP-螯合钯配合物存在下进行反应，实现了烯烃和1,3-二烯的脱氢硼化反应。该方案具有以下显著特点：1) PSiP-螯合配体的单阴离子性质阻止了硼(氢)化物或二氢化钯物种的形成，从而能够从B2pin2和烯烃或1,3-二烯的1:1混合物中以良好的产率合成各种乙烯基或二烯基硼酸酯，而不形成氢硼化或氢化产物。2) 由于硅原子的强横向影响，PSiP-螯合钯配合物显示出高的迁移插入活性。3) 抑制这些副反应和PSiP-螯合钯配合物的高反应性使得高效连续脱氢硼化反应成为可能，从而根据烯烃上取代基的种类，使用超过2当量的B2pin2，生成1,1-或1,2-二硼化产物。机理研究表明，PSiP-螯合硼化钯配合物由氢化钯配合物和B2pin2生成，该配合物经过烯烃插入和β-氢消除，生成烯基硼酸酯，并再生氢化钯配合物。