(S)-3-(2-Bromo-4-phenyl-butyryl)-1-methyl-2-oxo-imidazolidine-4-carboxylic acid tert-butyl ester | 195828-78-5

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (S)-3-(2-Bromo-4-phenyl-butyryl)-1-methyl-2-oxo-imidazolidine-4-carboxylic acid tert-butyl ester
• 英文别名: tert-butyl (4S)-3-(2-bromo-4-phenylbutanoyl)-1-methyl-2-oxoimidazolidine-4-carboxylate
• CAS: 195828-78-5
• 化学式: C₁₉H₂₅BrN₂O₄
• 分子量: 425.322
• InChiKey: IZFOQTGFOBWEAX-LOACHALJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  26
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.53
• 拓扑面积：
  66.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  苄胺 、 (S)-3-(2-Bromo-4-phenyl-butyryl)-1-methyl-2-oxo-imidazolidine-4-carboxylic acid tert-butyl ester 在 potassium carbonate 作用下， 以 六甲基磷酰三胺 为溶剂， 反应 14.0h， 生成 tert-Butyl (4S)-3-<(2S)-2-(N-benzylamino)-4-phenylbutyryl>-1-methyl-2-oxoimidazolidine-4-carboxylate 、 tert-Butyl (4S)-3-<(2R)-2-(N-benzylamino)-4-phenylbutyryl>-1-methyl-2-oxoimidazolidine-4-carboxylate
  参考文献：
  名称：

  Stereospecific Amination by Dynamic Kinetic Resolution Utilizing 2-Oxoimidazolidine-4-carboxylate as a Novel Chiral Auxiliary

  摘要：

  A novel type of stereospecific amination by dynamic kinetic resolution using (4S)-2-oxoimidazolidine-4-carboxylate (1) as a chiral auxiliary was developed. A reaction of a diastereomeric mixture of (4S)-3-[(2RS)-2-bromoacyl]-2-oxoimidazolidine-4-carboxylates 4 with an amine in the presence of a base in HMPA predominantly afforded (4S)-3-[(2R)-2-(alkylamino)acyl]-2-oxoimidazolidine-4-carboxylates (S,R)-7 in good yields. The reaction proceeded by stereospecific S(N)2 type amination incorporated with rapid interconversion between the substrates (S,S)-4 and (S,R)-4. Mechanistic study suggested that the unique stereoselectivity was induced through the interaction between an amine and the ester group of (S,S)-4 in the transition state. The chiral auxiliary was easily removed with alkoxide anion to afford the alpha-amino acid synthon in good yields.

  DOI：

  10.1021/jo00126a029
• 作为产物：
  描述：

  tert-Butyl (4S)-3-<(2R)-2-(N-benzylamino)propionyl>-1-methyl-2-oxoimidazolidine-4-carboxylate 在 正丁基锂 、 potassium tert-butylate 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 为溶剂， 反应 1.5h， 生成 (S)-3-(2-Bromo-4-phenyl-butyryl)-1-methyl-2-oxo-imidazolidine-4-carboxylic acid tert-butyl ester
  参考文献：
  名称：

  Stereospecific Amination by Dynamic Kinetic Resolution Utilizing 2-Oxoimidazolidine-4-carboxylate as a Novel Chiral Auxiliary

  摘要：

  A novel type of stereospecific amination by dynamic kinetic resolution using (4S)-2-oxoimidazolidine-4-carboxylate (1) as a chiral auxiliary was developed. A reaction of a diastereomeric mixture of (4S)-3-[(2RS)-2-bromoacyl]-2-oxoimidazolidine-4-carboxylates 4 with an amine in the presence of a base in HMPA predominantly afforded (4S)-3-[(2R)-2-(alkylamino)acyl]-2-oxoimidazolidine-4-carboxylates (S,R)-7 in good yields. The reaction proceeded by stereospecific S(N)2 type amination incorporated with rapid interconversion between the substrates (S,S)-4 and (S,R)-4. Mechanistic study suggested that the unique stereoselectivity was induced through the interaction between an amine and the ester group of (S,S)-4 in the transition state. The chiral auxiliary was easily removed with alkoxide anion to afford the alpha-amino acid synthon in good yields.

  DOI：

  10.1021/jo00126a029

文献信息

• Dynamic Kinetic Resolution Utilizing 2-Oxoimidazolidine-4-carboxylate as a Chiral Auxiliary:  Stereoselective Alkylation of α-Bromo Amides with Malonic Ester Enolates
  作者：Akira Kubo、Hitoshi Kubota、Masami Takahashi、Ken-ichi Nunami

  DOI：10.1021/jo970484q

  日期：1997.8.1

  Stereoselective carbon-carbon bond formation by dynamic kinetic resolution using tert-butyl (4S)-1-methyl-2-oxoimidazolidine-4-carboxylate (1) as a chiral auxiliary was developed. Reaction of a diastereomeric mixture of tert-butyl (4S)-3-[(2RS)-2-bromoacyl]-1-methyl-2-oxoimidazolidine-4-carboxylates (2) with a malonic ester enolate in HMPA predominantly afforded tert-butyl (4S)-3-[(2R)-2-alkyl-3,3-bis(alkoxycarbonyl)propionyl]-1-methyl-2-oximidazolidine-4-carboxylate [(S,R)-8] in good yields. The stereoselectivity of this reaction was in accordance with our working hypothesis based on the conformational analysis of 2 and elucidated the unique characteristics of 1 as a novel chiral auxiliary for dynamic kinetic resolution. The alkylated products (S,R)-8ej,k were easily converted to chiral cx-alkyl succinic acid derivatives and chiral beta-amino acid derivatives, both of which have been known as key building blocks for the syntheses of a variety of biologically active compounds.
• Dynamic kinetic resolution utilizing 2-oxoimidazolidine-4-carboxylate as a chiral auxiliary: Stereoselective synthesis of α-amino acids by Gabriel reaction
  作者：Akira Kubo、Hitoshi Kubota、Masami Takahashi、Ken-ichi Nunami

  DOI：10.1016/0040-4039(96)00977-x

  日期：1996.7

  A Highly stereoselective Gabriel reaction via dynamic kinetic resolution utilizing 2-oxoimidazolidine-4-carboxylate as a chiral auxiliary was exploited. The reaction of tert-butyl (4S)-1-methyl-3-(2-bromopropionyl)-2-oxoimidazolidine-4- carboxylate (2a) with potassium phthalimide at room temperature predominantly afforded tert-butyl (4S)-1-methyl-3-((2S)-2-(phthaloylamino)propionyl)-2- oxoimidazolidine-4-carboxylate ((S,S)-5a) in a good yield which was derived to L-alanine derivative (7) by removal of the chiral auxiliary. Copyright (C) 1996 Elsevier Science Ltd.