6,7-Dimethoxy-N²-methyl-N²-(6-methylamino-hexyl)-quinazoline-2,4-diamine | 217973-01-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氮杂萘
• 英文名称: 6,7-Dimethoxy-N²-methyl-N²-(6-methylamino-hexyl)-quinazoline-2,4-diamine
• 英文别名: 6,7-dimethoxy-2-N-methyl-2-N-[6-(methylamino)hexyl]quinazoline-2,4-diamine
• CAS: 217973-01-8
• 化学式: C₁₈H₂₉N₅O₂
• 分子量: 347.461
• InChiKey: UOYJIHVLWDFQKN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  25
• 可旋转键数：
  10
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  85.5
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  6,7-Dimethoxy-N²-methyl-N²-(6-methylamino-hexyl)-quinazoline-2,4-diamine 在 氨 作用下， 以 1,4-二氧六环 、 乙醇 为溶剂， 反应 52.0h， 生成 N-{6-[(4-Amino-6,7-dimethoxy-quinazolin-2-yl)-methyl-amino]-hexyl}-3-aminomethyl-N-methyl-benzamide
  参考文献：
  名称：

  Design, Synthesis, and Biological Activity of Prazosin-Related Antagonists. Role of the Piperazine and Furan Units of Prazosin on the Selectivity for α₁-Adrenoreceptor Subtypes

  摘要：

  Prazosin-related quinazolines 4-20 were synthesized, and their biological profiles at alpha(1)-adrenoreceptor subtypes were assessed by functional experiments in isolated rat vas deferens (alpha(1A)), spleen (alpha(1B)), and aorta (alpha(1D)) and by binding assays in CHO cells expressing human cloned alpha(1)-adrenoreceptor subtypes. The replacement of piperazine and furan units of prazosin (1) by 1,6-hexanediamine and phenyl moieties, respectively, affording 3-20, markedly affected both affinity and selectivity for alpha(1D)-adrenoreceptor subtypes in functional experiments. Cystazosin (3), bearing a cystamine moiety, was a selective alpha(1D)-adrenoreceptor antagonist being 1 order of magnitude more potent at alpha(1D)-adrenoreceptors (pA(2), 8.54 +/- 0.02) than at the alpha(1A)- (pA(2), 7.53 +/- 0.01) and alpha(1B)-subtypes (pA(2), 7.49 +/- 0.01). The insertion of substituents on the furan ring of 3, as in compounds 4 and 5, did not improve the selectivity profile. The simultaneous replacement of both piperazine and furan rings of 1 gave 8 which resulted in a potent, selective alpha(1B)-adrenoreceptor antagonist (85- and 15-fold more potent than at alpha(1A)- and alpha(1D)-subtypes, respectively). The insertion of substituents on the benzene ring of 8 affected, according to the type and the position of the substituent, affinity and selectivity for alpha(1)-adrenoreceptors. Consequently, the insertion of appropriate substituents in the phenyl ring of 8 may represent the basis of designing new selective Ligands for a1-adrenoreceptor subtypes. Interestingly, the finding that polyamines 11, 16, and 20, bearing a 1,6-hexanediamine moiety, retained high affinity for alpha(1)-adrenoreceptor subtypes suggests that the substituent did not give rise to negative interactions with the receptor. Finally, binding assays performed with selected quinazolines (2, 3, and 14) produced affinity results, which were not in agreement with the selectivity profiles obtained from functional experiments. This rather surprising and unexpected finding may be explained by considering neutral and negative antagonism.

  DOI：

  10.1021/jm9810654
• 作为产物：
  描述：

  N,N'-二甲基-1,6-己二胺 、 2-氯-4-氨基-6,7-二甲氧基喹唑啉 以 异戊醇 为溶剂， 反应 24.0h， 以63%的产率得到6,7-Dimethoxy-N²-methyl-N²-(6-methylamino-hexyl)-quinazoline-2,4-diamine
  参考文献：
  名称：

  Giardina, Dario; Crucianelli, Mauro; Marucci, Gabriella, Arzneimittel-Forschung/Drug Research, 1996, vol. 46, # 11, p. 1054 - 1059

  摘要：

  DOI：

文献信息

• Analogues of Prazosin That Bear a Benextramine-Related Polyamine Backbone Exhibit Different Antagonism toward α₁-Adrenoreceptor Subtypes
  作者：Maria L. Bolognesi、Gabriella Marucci、Piero Angeli、Michela Buccioni、Anna Minarini、Michela Rosini、Vincenzo Tumiatti、Carlo Melchiorre

  DOI：10.1021/jm000995w

  日期：2001.2.1

  Hybrid tetraaamine disulfides 4-9 were synthesized by combining the structural features of prazosin (1), a competitive alpha (1)-adrenoreceptor antagonist, and benextramine (2), an irreversible alpha (1)/alpha (2)-adrenoreceptor antagonist, and their biological profiles at alpha (1)-adrenoreceptor subtypes were assessed by functional experiments in isolated rat vas deferens (alpha (1A)), spleen (alpha (1B)), and aorta (alpha (1D)). To verify the role of the disulfide moiety on the interaction with alpha (1)-adrenorcceptor subtypes, carbon analogues 10-15 were included in this study. All quinazolines lacking the disulfide bridge behaved, like 1, as competitive antagonists, whereas all polyamine disulfides displayed a nonhomogeneous mechanism of inhibition at the three subtypes since they were, like 2, noncompetitive antagonists at the alpha (1A) and alpha (1B) subtypes while being, unlike 2, competitive antagonists at the alpha (1D). In particular, the blocking effects were characterized by a decrease of the maximal response to noradrenaline that was affected only slightly by washings. Probably the alpha (1A) and alpha (1B) subtypes bear in the binding pocket a suitable thiol function that would suffer an interchange reaction with the disulfide moiety of the antagonist and which is missing, or not accessible, in the alpha (1D) subtype. Polyamines 8, 9, and 14, among others, emerged as promising tools for the characterization of al-adrenoreceptors, owing to their receptor subtype selectivity. Finally, the effect of nonbasic substituents on the phenyl ring of prazosin analogues 16-28 on potency and selectivity for the different subtypes can hardly be rationalized.
• Design, Synthesis, and Biological Activity of Prazosin-Related Antagonists. Role of the Piperazine and Furan Units of Prazosin on the Selectivity for α₁-Adrenoreceptor Subtypes
  作者：Maria L. Bolognesi、Roberta Budriesi、Alberto Chiarini、Elena Poggesi、Amedeo Leonardi、Carlo Melchiorre

  DOI：10.1021/jm9810654

  日期：1998.11.1

  Prazosin-related quinazolines 4-20 were synthesized, and their biological profiles at alpha(1)-adrenoreceptor subtypes were assessed by functional experiments in isolated rat vas deferens (alpha(1A)), spleen (alpha(1B)), and aorta (alpha(1D)) and by binding assays in CHO cells expressing human cloned alpha(1)-adrenoreceptor subtypes. The replacement of piperazine and furan units of prazosin (1) by 1,6-hexanediamine and phenyl moieties, respectively, affording 3-20, markedly affected both affinity and selectivity for alpha(1D)-adrenoreceptor subtypes in functional experiments. Cystazosin (3), bearing a cystamine moiety, was a selective alpha(1D)-adrenoreceptor antagonist being 1 order of magnitude more potent at alpha(1D)-adrenoreceptors (pA(2), 8.54 +/- 0.02) than at the alpha(1A)- (pA(2), 7.53 +/- 0.01) and alpha(1B)-subtypes (pA(2), 7.49 +/- 0.01). The insertion of substituents on the furan ring of 3, as in compounds 4 and 5, did not improve the selectivity profile. The simultaneous replacement of both piperazine and furan rings of 1 gave 8 which resulted in a potent, selective alpha(1B)-adrenoreceptor antagonist (85- and 15-fold more potent than at alpha(1A)- and alpha(1D)-subtypes, respectively). The insertion of substituents on the benzene ring of 8 affected, according to the type and the position of the substituent, affinity and selectivity for alpha(1)-adrenoreceptors. Consequently, the insertion of appropriate substituents in the phenyl ring of 8 may represent the basis of designing new selective Ligands for a1-adrenoreceptor subtypes. Interestingly, the finding that polyamines 11, 16, and 20, bearing a 1,6-hexanediamine moiety, retained high affinity for alpha(1)-adrenoreceptor subtypes suggests that the substituent did not give rise to negative interactions with the receptor. Finally, binding assays performed with selected quinazolines (2, 3, and 14) produced affinity results, which were not in agreement with the selectivity profiles obtained from functional experiments. This rather surprising and unexpected finding may be explained by considering neutral and negative antagonism.
• Giardina, Dario; Crucianelli, Mauro; Marucci, Gabriella, Arzneimittel-Forschung/Drug Research, 1996, vol. 46, # 11, p. 1054 - 1059
  作者：Giardina, Dario、Crucianelli, Mauro、Marucci, Gabriella、Melchiorre, Carlo、Polidori, Carlo、Pompei, Pierluigi、Massi, Maurizio

  DOI：——

  日期：——