N-trans-caffeoyl-L-cysteine methyl ester

• 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: N-trans-caffeoyl-L-cysteine methyl ester
• 英文别名: methyl (2R)-2-[[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]amino]-3-sulfanylpropanoate
• 化学式: C₁₃H₁₅NO₅S
• 分子量: 297.332
• InChiKey: WUEWMMXPAZGRDI-SGRBOOSSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  20
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  96.9
• 氢给体数：
  4
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  TRANS-咖啡酸 、 L-半胱氨酸甲酯盐酸盐 在 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 2.5h， 以45%的产率得到N-trans-caffeoyl-L-cysteine methyl ester
  参考文献：
  名称：

  Free Radical Scavenging and Antioxidative Activity of Caffeic Acid Amide and Ester Analogues:  Structure−Activity Relationship

  摘要：

  The structure-activity relationships of synthetic caffeic acid amide and ester analogues as potential antioxidants and free radical scavengers have been investigated. The 2,2-diphenyl-1-picrylhydrazyl radical (DPPH.) scavenging activity of the test compounds was N-trans-caffeoyl-L-cysteine methyl ester (5) > N-trans-caffeoyldopamine (4) > N-trans-caffeoyltyramine (3) > N-trans-caffeoyl-beta-phenethylamine (2) > Trolox C (8) > caffeic acid phenethyl ester (1) > caffeic acid (6) > ferulic acid (7). This established that the radical scavenging activity of the compounds increased with increasing numbers of hydroxyl groups or catechol moieties and also with the presence of other hydrogen-donating groups (-NH, -SH). The antioxidative activity of the compounds was also investigated in an emulsified linoleic acid oxidation system accelerated by 2,2'-azobis(2-amidinopropane) dihydrochloride. The order was 1 > 2 > 4 > 3 greater than or equal to 5 > 6 > 8 > 7. Therefore, in the emulsion system, the antioxidative activity of the test compounds depends not only on the hydroxyl groups or catechol rings but also on the partition coefficient (log P) or hydrophobicity of the compounds. This supports the concept that hydrophobic antioxidants tend to exhibit better antioxidative activity in an emulsion system.

  DOI：

  10.1021/jf010830b

文献信息

• Free Radical Scavenging and Antioxidative Activity of Caffeic Acid Amide and Ester Analogues:  Structure−Activity Relationship
  作者：Sopheak Son、Betty A. Lewis

  DOI：10.1021/jf010830b

  日期：2002.1.1

  The structure-activity relationships of synthetic caffeic acid amide and ester analogues as potential antioxidants and free radical scavengers have been investigated. The 2,2-diphenyl-1-picrylhydrazyl radical (DPPH.) scavenging activity of the test compounds was N-trans-caffeoyl-L-cysteine methyl ester (5) > N-trans-caffeoyldopamine (4) > N-trans-caffeoyltyramine (3) > N-trans-caffeoyl-beta-phenethylamine (2) > Trolox C (8) > caffeic acid phenethyl ester (1) > caffeic acid (6) > ferulic acid (7). This established that the radical scavenging activity of the compounds increased with increasing numbers of hydroxyl groups or catechol moieties and also with the presence of other hydrogen-donating groups (-NH, -SH). The antioxidative activity of the compounds was also investigated in an emulsified linoleic acid oxidation system accelerated by 2,2'-azobis(2-amidinopropane) dihydrochloride. The order was 1 > 2 > 4 > 3 greater than or equal to 5 > 6 > 8 > 7. Therefore, in the emulsion system, the antioxidative activity of the test compounds depends not only on the hydroxyl groups or catechol rings but also on the partition coefficient (log P) or hydrophobicity of the compounds. This supports the concept that hydrophobic antioxidants tend to exhibit better antioxidative activity in an emulsion system.