2-(2,6-dimethylbenzyl)pyridine

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2-(2,6-dimethylbenzyl)pyridine
• 英文别名: MPV 399；Pyridine,2-(2,6-dimethylphenyl)methyl；2-[(2,6-dimethylphenyl)methyl]pyridine
• 化学式: C₁₄H₁₅N
• 分子量: 197.28
• InChiKey: SLFQEWLPQRTPPB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.21
• 拓扑面积：
  12.9
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  2-苄基吡啶 、 四甲基锡 在 palladium diacetate 、 copper diacetate 、 对苯醌 作用下， 以 乙腈 为溶剂， 反应 40.0h， 以65%的产率得到2-(2,6-dimethylbenzyl)pyridine
  参考文献：
  名称：

  Palladium-Catalyzed Alkylation of Aryl C−H Bonds with sp³ Organotin Reagents Using Benzoquinone as a Crucial Promoter

  摘要：

  The combination of directed C-H activation, batch-wise addition of tetraalkyltin reagents, and rate enhancement by benzoquinone and microwave irradiation provides a promising strategy for the direct coupling of C-H bonds with organometallic reagents. A variety of tetraalkyltins were coupled to C-H bonds to give the alkylated products in good yields by using 5 mol % Pd(OAc)2 as the catalyst. Benzoquinone was shown to be essential for the C-H activation when substrates containing non-pi-conjugated chelating groups are used. Monitoring the formation and reductive elimination of the Pd(Ar)(Me)L2 complex also revealed that benzoquinone promotes the reductive elimination step. Microwave irradiation enhances the reaction rate drastically. The versatility of this protocol was demonstrated by using substrates containing either oxazoline or pyridine as directing groups.

  DOI：

  10.1021/ja0570943

文献信息

• Mechanochemical Solvent‐Free Catalytic C−H Methylation
  作者：Shengjun Ni、Matic Hribersek、Swarna K. Baddigam、Fredric J. L. Ingner、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski

  DOI：10.1002/anie.202010202

  日期：2021.3.15

  The mechanochemical, solvent‐free, highly regioselective, rhodium‐catalyzed C−H methylation of (hetero)arenes is reported. The reaction shows excellent functional‐group compatibility and is demonstrated to work for the late‐stage C−H methylation of biologically active compounds. The method requires no external heating and benefits from considerably shorter reaction times than previous solution‐based

  报道了（杂）芳烃的机械化学、无溶剂、高度区域选择性、铑催化的 C−H 甲基化。该反应表现出优异的官能团相容性，并被证明适用于生物活性化合物的后期 C−H 甲基化。该方法不需要外部加热，并且反应时间比之前基于溶液的 CH 甲基化方案要短得多。此外，机械化学方法被证明可以有效合成传统方法难以生成的有机金属配合物。
• Palladium-Catalyzed Alkylation of Aryl C−H Bonds with sp³ Organotin Reagents Using Benzoquinone as a Crucial Promoter
  作者：Xiao Chen、Jiao-Jie Li、Xue-Shi Hao、Charles E. Goodhue、Jin-Quan Yu

  DOI：10.1021/ja0570943

  日期：2006.1.1

  The combination of directed C-H activation, batch-wise addition of tetraalkyltin reagents, and rate enhancement by benzoquinone and microwave irradiation provides a promising strategy for the direct coupling of C-H bonds with organometallic reagents. A variety of tetraalkyltins were coupled to C-H bonds to give the alkylated products in good yields by using 5 mol % Pd(OAc)2 as the catalyst. Benzoquinone was shown to be essential for the C-H activation when substrates containing non-pi-conjugated chelating groups are used. Monitoring the formation and reductive elimination of the Pd(Ar)(Me)L2 complex also revealed that benzoquinone promotes the reductive elimination step. Microwave irradiation enhances the reaction rate drastically. The versatility of this protocol was demonstrated by using substrates containing either oxazoline or pyridine as directing groups.