O6-[2-(methyl)benzyl]guanine | 261905-09-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 咪唑并嘧啶类
• 英文名称: O6-[2-(methyl)benzyl]guanine
• 英文别名: 6-[(2-methylphenyl)methoxy]-7H-purin-2-amine
• CAS: 261905-09-3
• 化学式: C₁₃H₁₃N₅O
• 分子量: 255.279
• InChiKey: GCCZRIFNCFGNEI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  89.7
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  邻甲基苄醇 、 1-(2-氨基-7H-嘌呤-6-基)-1-甲基吡咯烷鎓氯化物 在 potassium tert-butylate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 18.0h， 以35%的产率得到O6-[2-(methyl)benzyl]guanine
  参考文献：
  名称：

  Substitution of Aminomethyl at the Meta-Position Enhances the Inactivation of O⁶-Alkylguanine-DNA Alkyltransferase by O⁶-Benzylguanine

  摘要：

  O-6-Benzylguanine is an irreversible inactivator of O-6-alkylguanine-DNA alkyltransferase currently in clinical trials to overcome alkyltransferase-mediated resistance to certain cancer chemotherapeutic alkylating agents. In order to produce more soluble alkyltransferase inhibitors, we have synthesized three aminomethyl-substituted O-6-benzylguanines and the three methyl analogs and found that the substitution of aminomethyl at the meta-position greatly enhances inactivation of alkyltransferase, whereas para-substitution has little effect and ortho-substitution virtually eliminates activity. Molecular modeling of their interactions with alkyltransferase provided a molecular explanation for these results. The square of the correlation coefficient (R-2) obtained between E-model scores (obtained from GLIDE XP/QPLD docking calculations) vs log(ED50) values via a linear regression analysis was 0.96. The models indicate that the ortho-substitution causes a steric clash interfering with binding, whereas the meta-aminomethyl substitution allows an interaction of the amino group to generate an additional hydrogen bond with the protein.

  DOI：

  10.1021/jm800675p

文献信息

• Substitution of Aminomethyl at the Meta-Position Enhances the Inactivation of <i>O</i>⁶-Alkylguanine-DNA Alkyltransferase by <i>O</i>⁶-Benzylguanine
  作者：Gary T. Pauly、Natalia A. Loktionova、Qingming Fang、Sai Lakshmana Vankayala、Wayne C. Guida、Anthony E. Pegg

  DOI：10.1021/jm800675p

  日期：2008.11.27

  O-6-Benzylguanine is an irreversible inactivator of O-6-alkylguanine-DNA alkyltransferase currently in clinical trials to overcome alkyltransferase-mediated resistance to certain cancer chemotherapeutic alkylating agents. In order to produce more soluble alkyltransferase inhibitors, we have synthesized three aminomethyl-substituted O-6-benzylguanines and the three methyl analogs and found that the substitution of aminomethyl at the meta-position greatly enhances inactivation of alkyltransferase, whereas para-substitution has little effect and ortho-substitution virtually eliminates activity. Molecular modeling of their interactions with alkyltransferase provided a molecular explanation for these results. The square of the correlation coefficient (R-2) obtained between E-model scores (obtained from GLIDE XP/QPLD docking calculations) vs log(ED50) values via a linear regression analysis was 0.96. The models indicate that the ortho-substitution causes a steric clash interfering with binding, whereas the meta-aminomethyl substitution allows an interaction of the amino group to generate an additional hydrogen bond with the protein.