5,5,7,7-Tetramethyl-6,7-dihydro-5H-cyclopentapyrazine-2-carboxylic acid methyl ester | 212117-88-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 5,5,7,7-Tetramethyl-6,7-dihydro-5H-cyclopentapyrazine-2-carboxylic acid methyl ester
• 英文别名: methyl 5,5,7,7-tetramethyl-6H-cyclopenta[b]pyrazine-3-carboxylate
• CAS: 212117-88-9
• 化学式: C₁₃H₁₈N₂O₂
• 分子量: 234.298
• InChiKey: GRAOMFIIODTTFM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.62
• 拓扑面积：
  52.1
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  5,5,7,7-Tetramethyl-6,7-dihydro-5H-cyclopentapyrazine-2-carboxylic acid methyl ester 在 sodium hydroxide 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、 三乙胺 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 14.0h， 生成 dimethyl 5-[(5,5,7,7-tetramethyl-6H-cyclopenta[b]pyrazine-3-carbonyl)amino]benzene-1,3-dicarboxylate
  参考文献：
  名称：

  Synthesis and Structure−Activity Relationships of 2-Pyrazinylcarboxamido- benzoates and β-Ionylideneacetamidobenzoates with Retinoidal Activity

  摘要：

  The structure-activity relationships of two series of novel retinoids (2-pyrazinylcarboxamidobenzoates and beta-ionylideneacetamidobenzoates) have been investigated by evaluating their ability to induce differentiation in both human promyelocytic leukemia (HL60) cells and mouse embryonal carcinoma (P19) cells. The most active compound (ED50 = 8.3 x 10(-9) M) of the 2-pyrazinylcarboxamidobenzoates is 4-[2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethylquinoxalyl)-carboxamido]benzoic acid (9u), while the most active analogue of the beta-ionylideneacetamidobenzoates is 4-[3-methyl-5-(2',6',6'-trimethyl-1'-cyclohexen-1'-yl)-(2E,4E)-pentadienamido]benzoic acid (10a, ED50 = 3.2 x 10(-8) M). Our studies identify an absolute requirement for the carboxylic acid moiety on the aromatic ring to be para relative to the amide linkage for activity. Benzoate substitutions in the ortho position relative to the terminal carboxylate (9d,k,r) are well-tolerated; however, a methoxy substituent meta relative to the terminal carboxylate gives rise to only weakly active analogues (9x). Conformational studies (NMR, X-ray crystallography) of the 2-pyrazinylcarboxamidobenzoates indicate that the preferred conformation exhibits a trans-amide bond and an internal hydrogen bond between the quinoxaline N1 and HN amide which locks the torsional angle between C2 and CO in the s-trans conformation. N-Methylation (9y) results in loss of activity. Studies indicate that there is now a cis-amide bond present which redirects the carboxylate toward the pharmacophoric gem-dimethyl groups. The distance between the gem-dimethyl group and the terminal carboxylate appears to be too short to activate the retinoid receptor. N-Methylation in the beta-ionylideneacetamidobenzoate series (10c) also results in the formation of a cis-amide bond and loss of activity.

  DOI：

  10.1021/jm9801354
• 作为产物：
  描述：

  3,3,5,5-四甲基-1,2-环戊烷二酮 、 methyl 2,3-diaminopropionate hydrochloride 在 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 72.0h， 以75%的产率得到5,5,7,7-Tetramethyl-6,7-dihydro-5H-cyclopentapyrazine-2-carboxylic acid methyl ester
  参考文献：
  名称：

  Synthesis and Structure−Activity Relationships of 2-Pyrazinylcarboxamido- benzoates and β-Ionylideneacetamidobenzoates with Retinoidal Activity

  摘要：

  The structure-activity relationships of two series of novel retinoids (2-pyrazinylcarboxamidobenzoates and beta-ionylideneacetamidobenzoates) have been investigated by evaluating their ability to induce differentiation in both human promyelocytic leukemia (HL60) cells and mouse embryonal carcinoma (P19) cells. The most active compound (ED50 = 8.3 x 10(-9) M) of the 2-pyrazinylcarboxamidobenzoates is 4-[2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethylquinoxalyl)-carboxamido]benzoic acid (9u), while the most active analogue of the beta-ionylideneacetamidobenzoates is 4-[3-methyl-5-(2',6',6'-trimethyl-1'-cyclohexen-1'-yl)-(2E,4E)-pentadienamido]benzoic acid (10a, ED50 = 3.2 x 10(-8) M). Our studies identify an absolute requirement for the carboxylic acid moiety on the aromatic ring to be para relative to the amide linkage for activity. Benzoate substitutions in the ortho position relative to the terminal carboxylate (9d,k,r) are well-tolerated; however, a methoxy substituent meta relative to the terminal carboxylate gives rise to only weakly active analogues (9x). Conformational studies (NMR, X-ray crystallography) of the 2-pyrazinylcarboxamidobenzoates indicate that the preferred conformation exhibits a trans-amide bond and an internal hydrogen bond between the quinoxaline N1 and HN amide which locks the torsional angle between C2 and CO in the s-trans conformation. N-Methylation (9y) results in loss of activity. Studies indicate that there is now a cis-amide bond present which redirects the carboxylate toward the pharmacophoric gem-dimethyl groups. The distance between the gem-dimethyl group and the terminal carboxylate appears to be too short to activate the retinoid receptor. N-Methylation in the beta-ionylideneacetamidobenzoate series (10c) also results in the formation of a cis-amide bond and loss of activity.

  DOI：

  10.1021/jm9801354

文献信息

• Synthesis and Structure−Activity Relationships of 2-Pyrazinylcarboxamido- benzoates and β-Ionylideneacetamidobenzoates with Retinoidal Activity
  作者：Paul Jones、Gérald B. Villeneuve、Chengpei Fei、Josie DeMarte、Allison J. Haggarty、Khin Than Nwe、Deborah A. Martin、Anne-Marie Lebuis、Joshua M. Finkelstein、Barbara J. Gour-Salin、Tak Hang Chan、Brian R. Leyland-Jones

  DOI：10.1021/jm9801354

  日期：1998.7.1

  The structure-activity relationships of two series of novel retinoids (2-pyrazinylcarboxamidobenzoates and beta-ionylideneacetamidobenzoates) have been investigated by evaluating their ability to induce differentiation in both human promyelocytic leukemia (HL60) cells and mouse embryonal carcinoma (P19) cells. The most active compound (ED50 = 8.3 x 10(-9) M) of the 2-pyrazinylcarboxamidobenzoates is 4-[2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethylquinoxalyl)-carboxamido]benzoic acid (9u), while the most active analogue of the beta-ionylideneacetamidobenzoates is 4-[3-methyl-5-(2',6',6'-trimethyl-1'-cyclohexen-1'-yl)-(2E,4E)-pentadienamido]benzoic acid (10a, ED50 = 3.2 x 10(-8) M). Our studies identify an absolute requirement for the carboxylic acid moiety on the aromatic ring to be para relative to the amide linkage for activity. Benzoate substitutions in the ortho position relative to the terminal carboxylate (9d,k,r) are well-tolerated; however, a methoxy substituent meta relative to the terminal carboxylate gives rise to only weakly active analogues (9x). Conformational studies (NMR, X-ray crystallography) of the 2-pyrazinylcarboxamidobenzoates indicate that the preferred conformation exhibits a trans-amide bond and an internal hydrogen bond between the quinoxaline N1 and HN amide which locks the torsional angle between C2 and CO in the s-trans conformation. N-Methylation (9y) results in loss of activity. Studies indicate that there is now a cis-amide bond present which redirects the carboxylate toward the pharmacophoric gem-dimethyl groups. The distance between the gem-dimethyl group and the terminal carboxylate appears to be too short to activate the retinoid receptor. N-Methylation in the beta-ionylideneacetamidobenzoate series (10c) also results in the formation of a cis-amide bond and loss of activity.