(2S,3S)-2-[(R)-4-(4-Benzyloxy-benzyl)-7-nitro-3-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-3-methyl-pentanoic acid tert-butyl ester | 187872-71-5

• 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: (2S,3S)-2-[(R)-4-(4-Benzyloxy-benzyl)-7-nitro-3-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-3-methyl-pentanoic acid tert-butyl ester
• 英文别名: tert-butyl (2S,3S)-3-methyl-2-[(4R)-7-nitro-3-oxo-4-[(4-phenylmethoxyphenyl)methyl]-1,4-dihydroisoquinolin-2-yl]pentanoate
• CAS: 187872-71-5
• 化学式: C₃₃H₃₈N₂O₆
• 分子量: 558.675
• InChiKey: IGKNZTYVIYHZBF-KBTGMKBMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.8
• 重原子数：
  41
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.39
• 拓扑面积：
  102
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  (2S,3S)-2-[(R)-4-(4-Benzyloxy-benzyl)-7-nitro-3-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-3-methyl-pentanoic acid tert-butyl ester 在 palladium on activated charcoal 甲酸 、 ammonium formate 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以83%的产率得到(2S,3S)-2-[(R)-7-Amino-4-(4-hydroxy-benzyl)-3-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-3-methyl-pentanoic acid tert-butyl ester
  参考文献：
  名称：

  Design, Synthesis, and Biological Activities of Four Angiotensin II Receptor Ligands with γ-Turn Mimetics Replacing Amino Acid Residues 3−5

  摘要：

  Disulfide cyclization is a powerful method for reducing the conformational space of a peptide. This in turn may enable the study of its bioactive conformation. Several analogues of angiotensin II (Ang II) containing a disulfide bridge between amino acids 3 and 5 have been reported. Among these the cyclic octapeptides c[Hcy(3,5)]-Ang II, c[Cys(3,5)]-Ang II, and c[Pen(3,5)]Ang II showed significant activity at Ang II receptors. We have performed conformational analysis studies using theoretical calculations and H-1-NMR spectroscopy on tripeptide model compounds of these cyclic octapeptides which show that the cyclic moieties of c[Cys(3,5)]-Ang II and c[Pen(3,5)]-Ang II preferentially assume an inverse gamma-turn conformation. On the basis of these results, we substituted amino acid residues 3-5 in Ang II with two different gamma-turn mimetics giving four diastereomeric Ang II analogues. Interestingly, two of these are equipotent to Ang II in binding to AT(1) receptors. In the contractile test using rabbit aorta rings, one of the analogues is an agonist with full contractile activity approximately equipotent to c[Pen(3,5)]-Ang II but 300-fold less potent than Ang II. This low potency may suggest that Ang II does not adopt a gamma-turn in the 3-5 region when interacting with the receptor.

  DOI：

  10.1021/jm960553d
• 作为产物：
  描述：

  3-异色酮 在 硝酸铵 、 四溴化碳 、 硫酸 、 溶剂黄146 、 三乙胺 、 三苯基膦 、 三氟乙酸酐 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 5.0h， 生成 (2S,3S)-2-[(R)-4-(4-Benzyloxy-benzyl)-7-nitro-3-oxo-3,4-dihydro-1H-isoquinolin-2-yl]-3-methyl-pentanoic acid tert-butyl ester
  参考文献：
  名称：

  Design, Synthesis, and Biological Activities of Four Angiotensin II Receptor Ligands with γ-Turn Mimetics Replacing Amino Acid Residues 3−5

  摘要：

  Disulfide cyclization is a powerful method for reducing the conformational space of a peptide. This in turn may enable the study of its bioactive conformation. Several analogues of angiotensin II (Ang II) containing a disulfide bridge between amino acids 3 and 5 have been reported. Among these the cyclic octapeptides c[Hcy(3,5)]-Ang II, c[Cys(3,5)]-Ang II, and c[Pen(3,5)]Ang II showed significant activity at Ang II receptors. We have performed conformational analysis studies using theoretical calculations and H-1-NMR spectroscopy on tripeptide model compounds of these cyclic octapeptides which show that the cyclic moieties of c[Cys(3,5)]-Ang II and c[Pen(3,5)]-Ang II preferentially assume an inverse gamma-turn conformation. On the basis of these results, we substituted amino acid residues 3-5 in Ang II with two different gamma-turn mimetics giving four diastereomeric Ang II analogues. Interestingly, two of these are equipotent to Ang II in binding to AT(1) receptors. In the contractile test using rabbit aorta rings, one of the analogues is an agonist with full contractile activity approximately equipotent to c[Pen(3,5)]-Ang II but 300-fold less potent than Ang II. This low potency may suggest that Ang II does not adopt a gamma-turn in the 3-5 region when interacting with the receptor.

  DOI：

  10.1021/jm960553d