2,6-Dimethyl-4-(5-pentyl-3-phenyl-isoxazol-4-yl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester | 128388-60-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 2,6-Dimethyl-4-(5-pentyl-3-phenyl-isoxazol-4-yl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester
• 英文别名: Diethyl 2,6-dimethyl-4-(5-pentyl-3-phenyl-1,2-oxazol-4-yl)-1,4-dihydropyridine-3,5-dicarboxylate
• CAS: 128388-60-3
• 化学式: C₂₇H₃₄N₂O₅
• 分子量: 466.577
• InChiKey: DLPWKVILLXAXSX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.7
• 重原子数：
  34
• 可旋转键数：
  12
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  90.7
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  4-(4,4-dimethyl-4,5-dihydro-2-oxazolinyl)-5-methyl-3-phenylisoxazole 在 lithium aluminium tetrahydride 、 正丁基锂 、 tetramethylpiperidine-N-oxy free radical 、 氨 、 氧气 、 copper(l) chloride 作用下， 以 乙醇 为溶剂， 反应 2.0h， 生成 2,6-Dimethyl-4-(5-pentyl-3-phenyl-isoxazol-4-yl)-1,4-dihydro-pyridine-3,5-dicarboxylic acid diethyl ester
  参考文献：
  名称：

  4-Isoxazolyl-1,4-dihydropyridines: biological, theoretical, and structural studies

  摘要：

  Biological activity was determined for a series of seven isoxazolyldihydropyridines (IDHPs). The highest biological activity was observed for 5-alkyl-3-phenyl-IDHP (1), for which the O-endo conformation at the ring juncture between the heterocyclic rings is known in the solid state. The 3,5-dialkyl-IDHPs were intermediate in overall activity. A theoretical study of rotation about this ring juncture was performed to estimate the relative energy and barrier to rotation for the different conformers as a function of both the ring juncture between the heterocyclic rings and the esters in the 3- and 5-position of the dihydropyridine. Molecular mechanics predicts the minimum energy conformer to be O-exo-ap,ap, while quantum mechanical calculations predict O-exo-sp,sp as the minimum-energy conformer. Both methods indicate that the barrier to rotation about the heterocyclic ring juncture should be relative low, but both methods appear to overestimate the difficulty of ester rotation. A single-crystal X-ray diffractometry study of the (3,5-dimethylisoxazolyl)dihydropyridine 2 was carried out, and shows the O-endo ring juncture and sp,sp ester conformation. 2D NOESY NMR spectroscopy indicates the presence of both conformations about the ring juncture, at room temperature, as evidenced by correlations for both alkyl groups on the isoxazole with the C-2 methyl on the DHP moiety. The ap ester conformer was also evidenced by NOESY, indicating that ester interconversion must take place.

  DOI：

  10.1021/jm00170a032

文献信息

• NATALE, N. R.;TRIGGLE, DAVID J.;PALMER, ROBERT B.;LEFLER, BARBARA J.;EDWA+, J. MED. CHEM., 33,(1990) N, C. 2255-2259
  作者：NATALE, N. R.、TRIGGLE, DAVID J.、PALMER, ROBERT B.、LEFLER, BARBARA J.、EDWA+

  DOI：——

  日期：——
• 4-Isoxazolyl-1,4-dihydropyridines: biological, theoretical, and structural studies
  作者：N. R. Natale、David J. Triggle、Robert B. Palmer、Barbara J. Lefler、W. Daniel Edwards

  DOI：10.1021/jm00170a032

  日期：1990.8

  Biological activity was determined for a series of seven isoxazolyldihydropyridines (IDHPs). The highest biological activity was observed for 5-alkyl-3-phenyl-IDHP (1), for which the O-endo conformation at the ring juncture between the heterocyclic rings is known in the solid state. The 3,5-dialkyl-IDHPs were intermediate in overall activity. A theoretical study of rotation about this ring juncture was performed to estimate the relative energy and barrier to rotation for the different conformers as a function of both the ring juncture between the heterocyclic rings and the esters in the 3- and 5-position of the dihydropyridine. Molecular mechanics predicts the minimum energy conformer to be O-exo-ap,ap, while quantum mechanical calculations predict O-exo-sp,sp as the minimum-energy conformer. Both methods indicate that the barrier to rotation about the heterocyclic ring juncture should be relative low, but both methods appear to overestimate the difficulty of ester rotation. A single-crystal X-ray diffractometry study of the (3,5-dimethylisoxazolyl)dihydropyridine 2 was carried out, and shows the O-endo ring juncture and sp,sp ester conformation. 2D NOESY NMR spectroscopy indicates the presence of both conformations about the ring juncture, at room temperature, as evidenced by correlations for both alkyl groups on the isoxazole with the C-2 methyl on the DHP moiety. The ap ester conformer was also evidenced by NOESY, indicating that ester interconversion must take place.