3-(p-vinylphenyl)-3-oxopropanenitrile | 198213-32-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3-(p-vinylphenyl)-3-oxopropanenitrile
• 英文别名: 3-(4-ethenylphenyl)-3-oxopropanenitrile
• CAS: 198213-32-0
• 化学式: C₁₁H₉NO
• 分子量: 171.199
• InChiKey: JMKKSDVSICKMPI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.43
• 重原子数：
  13.0
• 可旋转键数：
  3.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.09
• 拓扑面积：
  40.86
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  3-(p-vinylphenyl)-3-oxopropanenitrile 在 一水合肼 作用下， 以 乙醇 为溶剂， 反应 2.5h， 以90%的产率得到3-amino-5-(p-vinylphenyl)pyrazole
  参考文献：
  名称：

  Intermolecular β-Sheet Stabilization with Aminopyrazoles

  摘要：

  3-Aminopyrazole derivatives are the first artificial templates that stabilize the beta-sheet conformation in N/C-protected dipeptides by purely intermolecular interactions. In the complex two aminopyrazole molecules lie exactly above and below the peptide backbone. Binding to the top face of the peptide is strongly favored because it forms three cooperative hydrogen bonds simultaneously to the receptor molecule, whereas the bottom face has only two. Polymerizable 3-amino- and 3-amidopyrazoles have been made accessible in excellent yields by a general route starting from p-toluic acid. With H-1 NMR titrations binding constants for the 1:1 complex of up to 880 M-1 have been determined in chloroform. The association constants are strongly influenced by the electronic character of the aminopyrazole derivative as well as by the steric demand of the peptide residues. Variable temperature studies prove that the complex is formed by dynamic hydrogen bonds and confirmed the preferential binding of the receptor molecules at the top face. By detailed Karplus-analysis of the NH-alpha-CH coupling constants in the complex a remarkable correlation between the dihedral angle theta and the degree of complexation was found, which shows that several amidopyrazoles are capable of forcing the dipeptide into an almost ideal P-sheet conformation. In glycine-containing dipeptides the third hydrogen bond slows down the free rotation around the C-C/C-N bond to almost zero. Intramolecular nuclear Overhauser enhancements (NOE) provide additional evidence for the peptide's extended conformation, while strong reciprocal intermolecular NOEs give the final proof of the existence of the critical third hydrogen bond and the postulated mutual orientation of the complexation partners. First H-1 NMR titrations with tripeptides show very promising results concerning the application of this concept to oligopeptides.

  DOI：

  10.1021/ja972158y
• 作为产物：
  描述：

  4-乙烯基苯甲酰氯 、 氰乙酸 在 盐酸 、 正丁基锂 作用下， 生成 3-(p-vinylphenyl)-3-oxopropanenitrile
  参考文献：
  名称：

  Intermolecular β-Sheet Stabilization with Aminopyrazoles

  摘要：

  3-Aminopyrazole derivatives are the first artificial templates that stabilize the beta-sheet conformation in N/C-protected dipeptides by purely intermolecular interactions. In the complex two aminopyrazole molecules lie exactly above and below the peptide backbone. Binding to the top face of the peptide is strongly favored because it forms three cooperative hydrogen bonds simultaneously to the receptor molecule, whereas the bottom face has only two. Polymerizable 3-amino- and 3-amidopyrazoles have been made accessible in excellent yields by a general route starting from p-toluic acid. With H-1 NMR titrations binding constants for the 1:1 complex of up to 880 M-1 have been determined in chloroform. The association constants are strongly influenced by the electronic character of the aminopyrazole derivative as well as by the steric demand of the peptide residues. Variable temperature studies prove that the complex is formed by dynamic hydrogen bonds and confirmed the preferential binding of the receptor molecules at the top face. By detailed Karplus-analysis of the NH-alpha-CH coupling constants in the complex a remarkable correlation between the dihedral angle theta and the degree of complexation was found, which shows that several amidopyrazoles are capable of forcing the dipeptide into an almost ideal P-sheet conformation. In glycine-containing dipeptides the third hydrogen bond slows down the free rotation around the C-C/C-N bond to almost zero. Intramolecular nuclear Overhauser enhancements (NOE) provide additional evidence for the peptide's extended conformation, while strong reciprocal intermolecular NOEs give the final proof of the existence of the critical third hydrogen bond and the postulated mutual orientation of the complexation partners. First H-1 NMR titrations with tripeptides show very promising results concerning the application of this concept to oligopeptides.

  DOI：

  10.1021/ja972158y

文献信息

• Intermolecular β-Sheet Stabilization with Aminopyrazoles
  作者：Christian N. Kirsten、Thomas H. Schrader

  DOI：10.1021/ja972158y

  日期：1997.12.17

  3-Aminopyrazole derivatives are the first artificial templates that stabilize the beta-sheet conformation in N/C-protected dipeptides by purely intermolecular interactions. In the complex two aminopyrazole molecules lie exactly above and below the peptide backbone. Binding to the top face of the peptide is strongly favored because it forms three cooperative hydrogen bonds simultaneously to the receptor molecule, whereas the bottom face has only two. Polymerizable 3-amino- and 3-amidopyrazoles have been made accessible in excellent yields by a general route starting from p-toluic acid. With H-1 NMR titrations binding constants for the 1:1 complex of up to 880 M-1 have been determined in chloroform. The association constants are strongly influenced by the electronic character of the aminopyrazole derivative as well as by the steric demand of the peptide residues. Variable temperature studies prove that the complex is formed by dynamic hydrogen bonds and confirmed the preferential binding of the receptor molecules at the top face. By detailed Karplus-analysis of the NH-alpha-CH coupling constants in the complex a remarkable correlation between the dihedral angle theta and the degree of complexation was found, which shows that several amidopyrazoles are capable of forcing the dipeptide into an almost ideal P-sheet conformation. In glycine-containing dipeptides the third hydrogen bond slows down the free rotation around the C-C/C-N bond to almost zero. Intramolecular nuclear Overhauser enhancements (NOE) provide additional evidence for the peptide's extended conformation, while strong reciprocal intermolecular NOEs give the final proof of the existence of the critical third hydrogen bond and the postulated mutual orientation of the complexation partners. First H-1 NMR titrations with tripeptides show very promising results concerning the application of this concept to oligopeptides.