(2S,3R)-2-叠氮基-3-(4-甲氧基苯基)丁酸 | 151800-34-9

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 苯丙酸
• 中文名称: (2S,3R)-2-叠氮基-3-(4-甲氧基苯基)丁酸
• 英文名称: (2S,3R)-2-Azido-3-(4-methoxyphenyl)butyric acid
• 英文别名: (2S,3R)-2-azido-3-(4-methoxyphenyl)butanoic acid
• CAS: 151800-34-9
• 化学式: C₁₁H₁₃N₃O₃
• 分子量: 235.243
• InChiKey: KHDBMPPDQWEXCJ-XCBNKYQSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  60.9
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (2S,3R)-2-叠氮基-3-(4-甲氧基苯基)丁酸 在 palladium on activated charcoal 盐酸 、 氢溴酸 、 氢气 作用下， 以 溶剂黄146 为溶剂， 25.0 ℃ 、101.33 kPa 条件下， 反应 21.0h， 生成 threo-L-(2S,3R)-β-Methyltyrosine
  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
• 作为产物：
  描述：

  (3(2S,3R),4R)-3-<2-Azido-3-(4-methoxyphenyl)butyroyl>-4-phenyl-2-oxazolidinone 在 lithium hydroxide 、 双氧水 作用下， 以 四氢呋喃 为溶剂， 反应 0.75h， 生成 (2S,3R)-2-叠氮基-3-(4-甲氧基苯基)丁酸
  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

文献信息

• Efficient method for the total asymmetric synthesis of the isomers of .beta.-methyltyrosine
  作者：Ernesto Nicolas、K. C. Russell、J. Knollenberg、Victor J. Hruby

  DOI：10.1021/jo00078a042

  日期：1993.12

  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.