2-benzamido-5-methyl-benzenephosphonic acid diethylester | 404578-21-8

• 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-benzamido-5-methyl-benzenephosphonic acid diethylester
• 英文别名: diethyl (2-benzamido-5-methylphenyl)phosphonate；N-(2-diethoxyphosphoryl-4-methylphenyl)benzamide
• CAS: 404578-21-8
• 化学式: C₁₈H₂₂NO₄P
• 分子量: 347.351
• InChiKey: FRQOOLHJRXIVPO-UHFFFAOYSA-N

物化性质

• 沸点：
  410.9±45.0 °C(Predicted)
• 密度：
  1.19±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  24
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  64.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-benzamido-5-methyl-benzenephosphonic acid diethylester 在 lithium aluminium tetrahydride 作用下， 以 乙醚 为溶剂， 反应 48.0h， 以68%的产率得到2-phenyl-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：

  2-溴-4-甲基苯胺 在 三乙胺 、 nickel dichloride 作用下， 以 乙醚 为溶剂， 反应 48.0h， 生成 2-benzamido-5-methyl-benzenephosphonic acid diethylester
  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

文献信息

• Visible-Light-Induced C(sp²)–P Bond Formation by Denitrogenative Coupling of Benzotriazoles with Phosphites
  作者：Yong Jian、Ming Chen、Binbin Huang、Wei Jia、Chao Yang、Wujiong Xia

  DOI：10.1021/acs.orglett.8b02288

  日期：2018.9.7

  A visible-light-induced denitrogenative phosphorylation of benzotriazoles is presented, in which diverse substituted aryl phosphonates could be obtained in good to excellent yields. This efficient protocol exhibits good tolerance with various functional groups. Furthermore, the utility of this photochemical protocol is demonstrated by a gram-scale reaction, and a reasonable mechanism is proposed.

  提出了可见光诱导的苯并三唑的脱氮磷酸化，其中可以以良好至优异的产率获得各种取代的芳基膦酸酯。这种有效的协议显示出对各种官能团的良好耐受性。此外，通过克级反应证明了该光化学方案的实用性，并提出了合理的机理。
• Synthesis of 1H-1,3-benzazaphospholes: substituent influence and mechanistical aspects
  作者：Joachim Heinicke、Nidhi Gupta、Anushka Surana、Normen Peulecke、Brigitte Witt、Kinga Steinhauser、Raj K Bansal、Peter G Jones

  DOI：10.1016/s0040-4020(01)01019-5

  日期：2001.12

  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.