(2S)-N-[(2S)-1-[(2-amino-2-oxoethyl)amino]-4-methyl-1-oxopentan-2-yl]-1-[(4R,7S,10S,13S,16S)-7-(2-amino-2-oxoethyl)-10-(3-amino-3-oxopropyl)-13-[(2S)-butan-2-yl]-16-[(4-hydroxyphenyl)methyl]-20,20-dimethyl-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]pyrrolidine-2-carboxamide | 6663-74-7

• 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: (2S)-N-[(2S)-1-[(2-amino-2-oxoethyl)amino]-4-methyl-1-oxopentan-2-yl]-1-[(4R,7S,10S,13S,16S)-7-(2-amino-2-oxoethyl)-10-(3-amino-3-oxopropyl)-13-[(2S)-butan-2-yl]-16-[(4-hydroxyphenyl)methyl]-20,20-dimethyl-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]pyrrolidine-2-carboxamide
• CAS: 6663-74-7
• 化学式: C₄₅H₆₉N₁₁O₁₂S₂
• 分子量: 1020.24
• InChiKey: IZIWNJRAVSDMFB-VNHOCEMUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.1
• 重原子数：
  70
• 可旋转键数：
  17
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.62
• 拓扑面积：
  424
• 氢给体数：
  11
• 氢受体数：
  14

反应信息

• 作为产物：
  描述：

  [dPen(H)¹,Cys(H)⁶]oxytocin 在 碳酸氢铵 、 溶剂黄146 、 二甲基亚砜 作用下， 反应 20.0h， 以22%的产率得到(2S)-N-[(2S)-1-[(2-amino-2-oxoethyl)amino]-4-methyl-1-oxopentan-2-yl]-1-[(4R,7S,10S,13S,16S)-7-(2-amino-2-oxoethyl)-10-(3-amino-3-oxopropyl)-13-[(2S)-butan-2-yl]-16-[(4-hydroxyphenyl)methyl]-20,20-dimethyl-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosane-4-carbonyl]pyrrolidine-2-carboxamide
  参考文献：
  名称：

  A Study of the Relationship between Biological Activity and Prolyl Amide Isomer Geometry in Oxytocin Using 5-tert-Butylproline To Augment the Cys⁶-Pro⁷ Amide Cis-Isomer Population

  摘要：

  Three [5-t-BuPro(7)]oxytocin analogues were synthesized by substituting (2S,5R)-5-tert-butyl-proline for proline in oxytocin, [Mpa(1)]oxytocin, and [dPen(1)]oxytocin. Relative to oxytocin, [5-t-BuPro(7)]oxytocin and [Mpa(1),5-t-BuPro(7)]oxytocin exhibited strongly reduced binding affinity to the receptor; however, both peptides maintained the pharmacophore characteristics responsible for signal transfer evoking the same maximal response as oxytocin in the single-dose procedure and exhibiting partial agonistic activity in the cumulative dose-response procedure. Although [dPen(1)]oxytocin exhibited inhibitory as well as partial agonistic activity, [dPen(1),5-t-BuPro(7)]oxytocin exhibited only inhibitory potency with a similar in vitro pA(2) value of 7.50 in the absence of magnesium. In the presence of magnesium, [dPen(1),5-t-BuPro7]oxytocin exhibited stronger inhibitory potency than [dPen(1)]oxytocin and no partial agonism. Assignment of the proton signals for the 5-tert-butylprolyl amide cis- and trans-isomers by two-dimensional NMR experiments in water indicated that the Cys(6)-Pro(7) peptide bond cis-isomer population was augmented relative to the prolyl peptides and measured respectively at 35%, 33%, and 20% in the 5-tert-butylproline(7) analogues of oxytocin, [Mpa(1)]oxytocin and [dPen(1)]oxytocin. Although caution must be taken when relating the increase in cis-isomer population with an influence on biological activity in [5-t-BuPro7(])oxytocin analogues, the synthesis and evaluation of analogues 1-3 have provided additional evidence that can be used to support the hypothesis that the prolyl amide cis-isomer may favor antagonism and the trans-isomer is necessary for agonist activity.

  DOI：

  10.1021/jm990090m