N-(2-bromo-4-methylphenyl)pivalamide | 87995-50-4

• 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: N-(2-bromo-4-methylphenyl)pivalamide
• 英文别名: N-(2-bromo-4-methylphenyl)-2,2-dimethylpropanamide
• CAS: 87995-50-4
• 化学式: C₁₂H₁₆BrNO
• mdl: MFCD01342307
• 分子量: 270.169
• InChiKey: HBNZGZDYMNYJMC-UHFFFAOYSA-N

物化性质

• 熔点：
  63 °C(Solv: ethanol (64-17-5))
• 沸点：
  371.3±30.0 °C(Predicted)
• 密度：
  1.320±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.416
• 拓扑面积：
  29.1
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  N-(2-bromo-4-methylphenyl)pivalamide 在 lithium aluminium tetrahydride 、 nickel dichloride 作用下， 以 乙醚 为溶剂， 反应 48.33h， 生成 2-(tert-butyl)-5-methyl-1H-1,3-benzazaphosphole
  参考文献：
  名称：

  Synthesis of 1H-1,3-benzazaphospholes: substituent influence and mechanistical aspects

  摘要：

  Various substituted carboxylic acid 2-chloro- and 2-bromoanilides 1a-j react with triethylphosphite in the presence of anhydrous NiCl2 or NiBr2 to give o-acylamido-benzenephosphonic acid esters 2a-g and 2j. Yields depend strongly on the substituents. 2-Fluoro-4,6-dibromoacetanilide 1g reacts only at 6-position, indicating an o-directed process. Based on substituent effects, we infer a mechanism via Ni(0) intermediates that insert into the carbon-halogen bond. The N-tertiary 2-bromoformanilide 4 does not undergo phosphonylation to 5 in the presence of the Ni-catalyst but reacts in the presence of Pd-catalysts. The subsequent reduction of the N-secondary o-acylamido-benzenephosphonic acid esters 2 with excess LiAlH4 is coupled with an intramolecular cyclisation to the 1H-1,3-benzazaphospholes 6 whereas the N-tertiary derivative 5 does not undergo cyclisation upon reduction. NMR data and the crystal structure of 6d are reported. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(01)01019-5
• 作为产物：
  描述：

  乙烷,三氯氟- 在 N-溴代丁二酰亚胺(NBS) 、 palladium diacetate 、 对甲苯磺酸 、 三乙胺 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 1.0h， 生成 N-(2-bromo-4-methylphenyl)pivalamide
  参考文献：
  名称：

  轻度C吗？苯甲酸酯的H卤化和不常见的钯（I）–钯（II）物种的分离

  摘要：

  减少负荷：在有氧条件下，在对甲苯磺酸（PTSA）的存在下使用N-卤代琥珀酰亚胺（NXS）时，在室温下好氧条件下，钯的催化邻位溴化和氯离子氯化很容易进行。正统的PTSA配合物不仅具有催化能力，而且还经过还原过程生成不寻常的Pd I –Pd II四聚体（见结构； Pd绿色，O红色，S黄色和C灰色）。

  DOI：

  10.1002/anie.201101606

文献信息

• Nickel(II)- and Silver(I)-Catalyzed C–H Bond Halogenation of Anilides and Carbamates
  作者：Ebrahim Kianmehr、Hadi Afaridoun

  DOI：10.1055/s-0040-1705972

  日期：2021.4

  ortho-C–H bond halogenation of anilides and N-aryl carbamates using easily available N-halosuccinimides (NXS) as the active halogenation reagent in the presence of nickel or silver catalyst has been developed. This method provides a new approach to 2-haloanilides and carbamates, which may serve as starting materials for the synthesis of pharmaceutically and biologically active compounds.

  已开发了在镍或银催化剂存在下使用易获得的N-卤代琥珀酰亚胺（NXS）作为活性卤化试剂对苯甲酸酯和N-芳基氨基甲酸酯进行邻-C–H键卤化的方法。该方法提供了2-卤代苯胺和氨基甲酸酯的新方法，其可用作合成药物和生物活性化合物的起始材料。
• Palladium-Catalyzed C(sp³)H Activation: A Facile Method for the Synthesis of 3,4-Dihydroquinolinone Derivatives
  作者：Jia-Xuan Yan、Hu Li、Xiang-Wei Liu、Jiang-Ling Shi、Xin Wang、Zhang-Jie Shi

  DOI：10.1002/anie.201402562

  日期：2014.5.5

  s were synthesized by the palladium‐catalyzed, oxidative‐addition‐initiated activation and arylation of inert C(sp3)H bonds. Pd(OAc)2 and P(o‐tol)3 were used as the catalyst and ligand, respectively, to improve the efficiency of the reaction. A further advantage of this reaction is that it could be performed in air. A relatively rare seven‐membered palladacycle was proposed as a key intermediate of

  3,4-二氢喹啉酮是通过钯催化，氧化加成引发的惰性C（sp 3）H键的芳构化而合成的。Pd（OAc）2和P（o- tol）3分别用作催化剂和配体，以提高反应效率。该反应的另一个优点是它可以在空气中进行。有人提出了一种相对罕见的七元帕拉达环作为催化循环的关键中间体。
• Mild CH Halogenation of Anilides and the Isolation of an Unusual Palladium(I)-Palladium(II) Species
  作者：Robin B. Bedford、Mairi F. Haddow、Charlotte J. Mitchell、Ruth L. Webster

  DOI：10.1002/anie.201101606

  日期：2011.6.6

  Reducing the load: A facile palladium‐catalyzed ortho‐selective bromination and chlorination of anilides occurs under aerobic conditions at room temperature when N‐halosuccinimides (NXS) are used in the presence of p‐toluenesulfonic acid (PTSA). The orthopalladated PTSA complex is not only catalytically competent but also undergoes a reductive process to yield an unusual PdI–PdII tetramer (see structure;

  减少负荷：在有氧条件下，在对甲苯磺酸（PTSA）的存在下使用N-卤代琥珀酰亚胺（NXS）时，在室温下好氧条件下，钯的催化邻位溴化和氯离子氯化很容易进行。正统的PTSA配合物不仅具有催化能力，而且还经过还原过程生成不寻常的Pd I –Pd II四聚体（见结构； Pd绿色，O红色，S黄色和C灰色）。
• Copper-Catalyzed Dehydrogenative Cross-Coupling Reactions of N-para-Tolylamides through Successive CH Activation: Synthesis of 4H-3,1-Benzoxazines
  作者：Tao Xiong、Yan Li、Xihe Bi、Yunhe Lv、Qian Zhang

  DOI：10.1002/anie.201101391

  日期：2011.7.25

  A novel annulation reaction of readily available tolylamides was catalyzed by Cu(OTf)2 in the presence of Selectfluor and water through successive intermolecular CH activated dehydrogenative cross‐coupling reactions of benzylic methyl C(sp3)H and aromatic C(sp2)H bonds, and subsequent intramolecular CO bond formation (see scheme).

  一种新颖的环反应容易获得tolylamides的是由铜（OTF）催化2中的Selectfluor的存在和水通过连续的分子间Ç  ħ活化脱氢交叉耦合苄甲基C（SP的反应3） H和芳族C（SP 2）H键和随后的分子内CO键形成（请参阅方案）。
• A Modular Flow Design for the<i>meta</i>-Selective C−H Arylation of Anilines
  作者：Hannes P. L. Gemoets、Gabriele Laudadio、Kirsten Verstraete、Volker Hessel、Timothy Noël

  DOI：10.1002/anie.201703369

  日期：2017.6.12

  effective and practical modular flow design for the meta-selective C-H arylation of anilines. The design consists of four continuous-flow modules (i.e., diaryliodonium salt synthesis, meta-selective C-H arylation, inline copper extraction, and aniline deprotection) which can be operated either individually or consecutively to provide direct access to meta-arylated anilines. With a total residence time

  本文描述的是用于苯胺间位选择性CH芳基化的有效且实用的模块化流程设计。该设计由四个连续流模块（即二芳基碘鎓盐合成、间位选择性CH芳基化、在线铜萃取和苯胺脱保护）组成，这些模块可以单独或连续操作以提供间位芳基化苯胺的直接获取。总停留时间为1小时，无需柱层析即可高收率、高纯度地获得所需产物，且残留铜含量满足非肠道给药原料药的标准。