2-Acetyl-1-methylpyrazolo<1,5-c>quinazolin-5(6H)-one

• 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: 2-Acetyl-1-methylpyrazolo<1,5-c>quinazolin-5(6H)-one
• 英文别名: 2-acetyl-1-methyl-6H-pyrazolo[1,5-c]quinazolin-5-one
• 化学式: C₁₃H₁₁N₃O₂
• 分子量: 241.249
• InChiKey: SECLVBDWDPNYED-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  18
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  64
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  3-diazo-indolin-2-one 、 4-(methylamino)-3-penten-2-one 以 甲苯 为溶剂， 反应 168.0h， 以6%的产率得到1,5-dimethyl-1H-1,2,3-triazol-4-ylethan-1-one
  参考文献：
  名称：

  Reactions of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives with enaminones. A novel synthesis of 1,2,3-triazoles

  摘要：

  A new and efficient method of 1,2,3-triazole synthesis is described in which these heterocyclics are formed through a novel nitrogen transfer from diazocarbonyl compounds to enaminones. Thus, the reaction of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives 1 (X = NR3) and 3-diazobenzo[b]-thiophen-2(3H)-one 5 (X = S) with enaminones 2 and 7 leads to the formation of mainly 1,2,3-triazoles 4 and pyrazoloquinazolinones 3. Both the phenyl substituents (Y and Z in 1) and the nature of the X group affects the reaction rate and product distribution. Rate increases with an increase in the electron-withdrawing ability of the substituents Y and Z. The dinitro derivative 1g is shown to be the most efficient in promoting 1,2,3-triazole 4 formation while pyrazoloquinazolinones 3 are often competitively formed when other derivatives of 1 are employed.

  DOI：

  10.1021/jo00077a030

文献信息

• US4076818A
  申请人：——

  公开号：US4076818A

  公开（公告）日：1978-02-28
• US4112096A
  申请人：——

  公开号：US4112096A

  公开（公告）日：1978-09-05
• US4179561A
  申请人：——

  公开号：US4179561A

  公开（公告）日：1979-12-18
• Reactions of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives with enaminones. A novel synthesis of 1,2,3-triazoles
  作者：Rodinei Augusti、Concetta Kascheres

  DOI：10.1021/jo00077a030

  日期：1993.12

  A new and efficient method of 1,2,3-triazole synthesis is described in which these heterocyclics are formed through a novel nitrogen transfer from diazocarbonyl compounds to enaminones. Thus, the reaction of 3-diazo-1,3-dihydro-2H-indol-2-one derivatives 1 (X = NR3) and 3-diazobenzo[b]-thiophen-2(3H)-one 5 (X = S) with enaminones 2 and 7 leads to the formation of mainly 1,2,3-triazoles 4 and pyrazoloquinazolinones 3. Both the phenyl substituents (Y and Z in 1) and the nature of the X group affects the reaction rate and product distribution. Rate increases with an increase in the electron-withdrawing ability of the substituents Y and Z. The dinitro derivative 1g is shown to be the most efficient in promoting 1,2,3-triazole 4 formation while pyrazoloquinazolinones 3 are often competitively formed when other derivatives of 1 are employed.