5,6-Dibromo-1,3-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one | 234771-66-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 咪唑并吡啶类
• 英文名称: 5,6-Dibromo-1,3-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one
• 英文别名: 5,6-Dibromo-1,3-dimethylimidazo[4,5-b]pyridin-2-one
• CAS: 234771-66-5
• 化学式: C₈H₇Br₂N₃O
• 分子量: 320.971
• InChiKey: BJEOBHXBXILGCT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  14
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  36.4
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  5,6-Dibromo-1,3-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one 在 硫酸 、 potassium nitrate 作用下， 反应 3.5h， 以35%的产率得到6-bromo-1,3-dimethyl-5-nitro-1,3-dihydro-imidazo[4,5-b]pyridin-2-one
  参考文献：
  名称：

  1,3-二氢-2H-咪唑并[4,5-b]吡啶-2-酮衍生物的硝化

  摘要：

  Nitration of 1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one and its N-methyl derivatives at 0-5 degrees C and 60 degrees C gives 5-nitro- and 5,6-dinitro-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones, respectively. The latter can also be obtained by nitration of 5-mononitro derivatives under similar conditions. The nitration of 6-chloro- and 6-bromo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones and their N-methyl-substituted analogs leads to the formation of the corresponding 6-chloro(bromo)-5 -nitro compounds. The same products are formed in the nitration of 5,6-dichloro- and 5,6-dibromo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones. In this case, the process involves replacement of the halogen atom in position 5 of the pyridine fragment by nitro group. The nitration of 6-bromo-5-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one is accompanied by oxidation of the 5-methyl group to carboxy.

  DOI：

  10.1134/s1070428007030153
• 作为产物：
  描述：

  6-Bromo-1,3-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one 在 溴 、 sodium acetate 作用下， 以 溶剂黄146 为溶剂， 以87%的产率得到5,6-Dibromo-1,3-dimethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one
  参考文献：
  名称：

  Halogenation of Imidazo[4,5-b]pyridin-2-one Derivatives

  摘要：

  在醋酸中，以90–95°C对2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮及其N-甲基取代衍生物进行氯化和溴化，会形成相应的5,6-二氯（或二溴）-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。在类似条件下，使用ICl对相同底物进行碘化会生成6-碘衍生物。对6-碘-1,3-二甲基-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮进行氯化时，碘原子被氯取代，生成5,6-二氯-1,3-二甲基-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。对6-溴和6-氯-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮进行溴化分别得到5,6-二溴-和5-溴-6-氯-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。

  DOI：

  10.1007/s11178-005-0206-y

文献信息

• Yutilov; Malyutina; Lopatinskaya, Russian Journal of Organic Chemistry, 1998, vol. 34, # 9, p. 1363 - 1364
  作者：Yutilov、Malyutina、Lopatinskaya、Svertilova

  DOI：——

  日期：——
• Halogenation of Imidazo[4,5-b]pyridin-2-one Derivatives
  作者：Yu. M. Yutilov、Kh. Ya. Lopatinskaya、N. N. Smolyar、S. V. Gres’ko

  DOI：10.1007/s11178-005-0206-y

  日期：2005.4

  Chlorination and bromination of 2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-one and its N-methyl-substituted derivatives in acetic acid at 90–95°C leads to formation of the corresponding 5,6-dichloro(dibromo)-2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-ones. Iodination of the same substrates with ICl under analogous conditions yields 6-iodo derivatives. Chlorination of 6-iodo-1,3-dimethyl-2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-one is accompanied by replacement of the iodine atom by chlorine with formation of 5,6-dichloro-1,3-dimethyl-2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-one. Bromination of 6-bromo- and 6-chloro-2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-ones gives 5,6-dibromo- and 5-bromo-6-chloro-2,3-dihydro-1H-imidazo[4,5-b]pyridin-2-ones, respectively.

  在醋酸中，以90–95°C对2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮及其N-甲基取代衍生物进行氯化和溴化，会形成相应的5,6-二氯（或二溴）-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。在类似条件下，使用ICl对相同底物进行碘化会生成6-碘衍生物。对6-碘-1,3-二甲基-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮进行氯化时，碘原子被氯取代，生成5,6-二氯-1,3-二甲基-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。对6-溴和6-氯-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮进行溴化分别得到5,6-二溴-和5-溴-6-氯-2,3-二氢-1H-咪唑[4,5-b]吡啶-2-酮。
• Nitration of 1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one derivatives
  作者：N. N. Smolyar、Kh. Ya. Lopatinskaya、A. B. Vasilechko、D. A. Lomov、Yu. M. Yutilov

  DOI：10.1134/s1070428007030153

  日期：2007.3

  Nitration of 1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one and its N-methyl derivatives at 0-5 degrees C and 60 degrees C gives 5-nitro- and 5,6-dinitro-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones, respectively. The latter can also be obtained by nitration of 5-mononitro derivatives under similar conditions. The nitration of 6-chloro- and 6-bromo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones and their N-methyl-substituted analogs leads to the formation of the corresponding 6-chloro(bromo)-5 -nitro compounds. The same products are formed in the nitration of 5,6-dichloro- and 5,6-dibromo-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-ones. In this case, the process involves replacement of the halogen atom in position 5 of the pyridine fragment by nitro group. The nitration of 6-bromo-5-methyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one is accompanied by oxidation of the 5-methyl group to carboxy.