(2S)-2-[(4-methoxybenzoyl)amino]-3,3-dimethylbutanoic acid | 1285553-62-9

• 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: (2S)-2-[(4-methoxybenzoyl)amino]-3,3-dimethylbutanoic acid
• CAS: 1285553-62-9
• 化学式: C₁₄H₁₉NO₄
• mdl: MFCD16379886
• 分子量: 265.309
• InChiKey: ZFDGYAQIYFPKIT-LLVKDONJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  19
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.428
• 拓扑面积：
  75.6
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (2S)-2-[(4-methoxybenzoyl)amino]-3,3-dimethylbutanoic acid 在 乙酸酐 作用下， 生成 4-tert-butyl-2-(4-methoxyphenyl)oxazol-5-oxo-4,5-dihydrooxazole
  参考文献：
  名称：

  Probing the Efficiency of N-Heterocyclic Carbene Promoted O- to C-Carboxyl Transfer of Oxazolyl Carbonates

  摘要：

  Screening of a range of azolium salts, bases and solvents for reactivity indicates that triazolinylidenes, generated in situ with KHMDS in THF, promote the Steglich rearrangement of oxazolyl carbonates with high catalytic efficiency (typical reaction time 5 min at < 1.5 mol % NHC). This protocol shows wide substrate applicability, even allowing the efficient generation of vicinal quaternary centers. An improved experimental procedure is also described that allows a simplified one-pot reaction protocol to be employed with similarly high catalytic efficiency.

  DOI：

  10.1021/jo702720a
• 作为产物：
  描述：

  在 sodium hydroxide 作用下， 以 甲醇 为溶剂， 生成 (2S)-2-[(4-methoxybenzoyl)amino]-3,3-dimethylbutanoic acid
  参考文献：
  名称：

  Probing the Efficiency of N-Heterocyclic Carbene Promoted O- to C-Carboxyl Transfer of Oxazolyl Carbonates

  摘要：

  Screening of a range of azolium salts, bases and solvents for reactivity indicates that triazolinylidenes, generated in situ with KHMDS in THF, promote the Steglich rearrangement of oxazolyl carbonates with high catalytic efficiency (typical reaction time 5 min at < 1.5 mol % NHC). This protocol shows wide substrate applicability, even allowing the efficient generation of vicinal quaternary centers. An improved experimental procedure is also described that allows a simplified one-pot reaction protocol to be employed with similarly high catalytic efficiency.

  DOI：

  10.1021/jo702720a

文献信息

• Dynamic Kinetic Resolution of N-Protected Amino Acid Esters via Phase-Transfer Catalytic Base Hydrolysis
  作者：Eiji Yamamoto、Kodai Wakafuji、Yuho Furutachi、Kaoru Kobayashi、Takashi Kamachi、Makoto Tokunaga

  DOI：10.1021/acscatal.8b00693

  日期：2018.7.6

  Asymmetric base hydrolysis of α-chiral esters with synthetic small-molecule catalysts is described. Quaternary ammonium salts derived from quinine were used as chiral phase-transfer catalysts to promote the base hydrolysis of N-protected amino acid hexafluoroisopropyl esters in a CHCl3/NaOH (aq) via dynamic kinetic resolution, providing the corresponding products in moderate to good yields (up to 99%)

  描述了用合成的小分子催化剂对α-手性酯的不对称碱水解。奎宁衍生的季铵盐用作手性相转移催化剂，可通过动态动力学拆分促进CHCl 3 / NaOH（aq）中N保护的氨基酸六氟异丙基酯的碱水解，以中等至良好的收率提供相应的产物（最高99％）和最高96：4 er。使用DFT计算和伪过渡态（pseudo-TS）构象搜索进行的实验和计算机制研究提供了考虑立体选择性起源的TS模型。该模型表明，π-堆积和H-键相互作用在稳定TS结构中起重要作用。