2-[5-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine | 1349171-30-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 2-[5-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine
• 英文别名: 2-[5-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine
• CAS: 1349171-30-7
• 化学式: C₁₈H₂₂BNO₂
• 分子量: 295.189
• InChiKey: SYQRSBYLHHFTRU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.36
• 重原子数：
  22
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.39
• 拓扑面积：
  31.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-(3-甲苯基)吡啶 、 联硼酸频那醇酯 在 C₂₈H₃₈ClN₂O₂Rh 、 sodium methylate 作用下， 以 苯 为溶剂， 反应 16.17h， 生成 2-[5-methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]pyridine
  参考文献：
  名称：

  定向邻位使用的Cp *的Rh（C-H硼化催化III）-NHC络合物†

  摘要：

  Cp * Rh（NHC）配合物与庞大的手性双齿NHC-羧酸盐配体有效地合成和充分表征，包括固态结构。这些空前的铑（III）配合物在温和条件下在吡啶定向的芳烃邻位C-H硼酸酯化反应中显示出很高的选择性。

  DOI：

  10.1039/c8cc03144d

文献信息

• Directed <i>ortho</i> C–H borylation catalyzed using Cp*Rh(<scp>iii</scp>)–NHC complexes
  作者：Jompol Thongpaen、Thibault E. Schmid、Loic Toupet、Vincent Dorcet、Marc Mauduit、Olivier Baslé

  DOI：10.1039/c8cc03144d

  日期：——

  bidentate NHC-carboxylate ligands were efficiently synthesized and fully characterized including solid-state structures. These unprecedented rhodium(III) complexes demonstrated high selectivity in pyridine-directed ortho-C–H borylation of arenes under mild conditions.

  Cp * Rh（NHC）配合物与庞大的手性双齿NHC-羧酸盐配体有效地合成和充分表征，包括固态结构。这些空前的铑（III）配合物在温和条件下在吡啶定向的芳烃邻位C-H硼酸酯化反应中显示出很高的选择性。
• Rh-Catalyzed <i>Ortho</i>-Selective C–H Borylation of <i>N</i>-Functionalized Arenes with Silica-Supported Bridgehead Monophosphine Ligands
  作者：Soichiro Kawamorita、Tatsuya Miyazaki、Hirohisa Ohmiya、Tomohiro Iwai、Masaya Sawamura

  DOI：10.1021/ja208364a

  日期：2011.12.7

  Supported phosphine-Rh systems, prepared in situ from silica-supported bridgehead monophosphines and [Rh(OH)(cod)]2, have enabled ortho-selective C-H borylation for a range of arenes containing nitrogen-based directing groups. The regioselectivity was excellent with various N-directing groups, including saturated and unsaturated N-heterocycles, tert-aminoalkyl groups, and iminetype C-N double bonds. The reaction showed significant tolerance toward steric repulsion around the reacting C-H bond. This Rh catalysis complements the Jr-catalyzed orthoborylation, which is effective for arenes with oxygen-based directing groups.
• N-heterocyclic carbene enabled rhodium-catalyzed ortho C(sp2)-H borylation at room temperature
  作者：Lei Zhong、Zhi-Hong Zong、Xi-Cun Wang

  DOI：10.1016/j.tet.2019.03.033

  日期：2019.4

  We report a rhodium-catalyzed ortho C(sp2)-H borylation of 2-phenylpyridines using commercially available N-heterocyclic carbenes (NHCs) as ligand and pinacolatodiboron (B2pin2) as borylating reagent. The reaction could take place at room temperature, tolerating a wide range of functionalities and affording ortho borylated products in moderate to excellent yields. The current method is also applicable

  我们报告了铑催化的2-苯基吡啶的邻位C（sp 2）-H硼酸化，使用市售的N-杂环卡宾（NHCs）作为配体，而频哪二硼烷（B 2 pin 2）作为硼化试剂。该反应可以在室温下进行，耐受各种功能，并以中等至极好的收率提供邻位硼酸酯化产物。当前的方法也适用于减少催化剂负载的克级反应。