(3(2R,3S),4R)-3-<2-Azido-3-(4-methoxyphenyl)butyroyl>-4-phenyl-2-oxazolidinone

• 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: (3(2R,3S),4R)-3-<2-Azido-3-(4-methoxyphenyl)butyroyl>-4-phenyl-2-oxazolidinone
• 英文别名: (4R)-3-[(2R,3S)-2-azido-3-(4-methoxyphenyl)butanoyl]-4-phenyl-1,3-oxazolidin-2-one
• 化学式: C₂₀H₂₀N₄O₄
• 分子量: 380.403
• InChiKey: NZFYZLLMZQSARH-DOPJRALCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  28
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  70.2
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  (R)-3-[(S)-2-Bromo-3-(4-methoxy-phenyl)-butyryl]-4-phenyl-oxazolidin-2-one 在 叠氮化四丁基铵 作用下， 以 乙腈 为溶剂， 反应 6.0h， 生成 (3(2R,3S),4R)-3-<2-Azido-3-(4-methoxyphenyl)butyroyl>-4-phenyl-2-oxazolidinone 、 (3(2S,3S),4R)-3-<2-Azido-3-(4-methoxyphenyl)butyroyl>-4-phenyl-2-oxazolidinone
  参考文献：
  名称：

  Efficient method for the total asymmetric synthesis of the isomers of .beta.-methyltyrosine

  摘要：

  Alpha-Amino acids modified at the beta-carbon atom can provide topographical constraints when incorporated into a peptide. Such modifications can modulate the physical, chemical, and biological properties of the compound. In order to properly evaluate the effect of such modifications, large-scale asymmetric syntheses of the isomers are needed. A method for the stereoselective large-scale synthesis of an four stereoisomers of beta-methyltyrosine is described in this paper. The stereochemistry of both the alpha- and beta-stereocenters was set using 4-phenyl-2-oxazolidinone as a chiral auxiliary. The key reactions were an asymmetric Michael-like addition of an organocuprate to a chiral alpha,beta-unsaturated acyloxazolidinone (beta center) and subsequent stereoselective electrophilic bromination of the resulting product (alpha center). Conversion of the bromide to the azide, catalyzed hydrolysis to the azido acid with simultaneous recovery of the chiral auxiliary, reduction of the azide, and final deprotection of the phenol group afforded the desired amino acids. In general, the reactions were performed in yields over 80 %, and the isomers were obtained in enantiomeric purities of 98:2 to 99:1.

  DOI：

  10.1021/jo00078a042