methyl 3-ethyl-4-oxo-4,5,6,7-tetrahydro-1H-indole-2-carboxylate | 142762-14-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吲哚及其衍生物
• 英文名称: methyl 3-ethyl-4-oxo-4,5,6,7-tetrahydro-1H-indole-2-carboxylate
• 英文别名: methyl 3-ethyl-4-oxo-1,5,6,7-tetrahydroindole-2-carboxylate
• CAS: 142762-14-9
• 化学式: C₁₂H₁₅NO₃
• 分子量: 221.256
• InChiKey: NBSFDIGCGRIRHS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  59.2
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  methyl 3-ethyl-4-oxo-4,5,6,7-tetrahydro-1H-indole-2-carboxylate 在 吡啶 、 sodium tetrahydroborate 作用下， 以 乙醇 为溶剂， 反应 24.42h， 生成 methyl 4-acetoxy-3-ethyl-4,5,6,7-tetrahydro-1H-indole-2-carboxylate
  参考文献：
  名称：

  Porphyrins with exocyclic rings. 1. Chemistry of 4,5,6,7-tetrahydro-1H-indoles: synthesis of acetoxy derivatives, dihydroindoles, and novel porphyrins with four exocyclic rings

  摘要：

  A variety of 4,5,6,7-tetrahydro-1H-indoles (THI's) and 4-oxo-4,5,6,7-tetrahydro-1H-indoles (4-oxoTHIs) have been synthesized from cyclohexanone and 1,3-cyclohexanedione, respectively. The THI's reacted regioselectively with lead tetraacetate in acetic acid to give the 7-acetoxy derivatives. The isomeric 4-acetoxyTHI's were prepared by first reducing the corresponding 4-oxoTHI's with sodium borohydride and then reacting the resulting hydroxyTHI' s with acetic acid-pyridine. Both series of acetoxyTHI's underwent elimination of acetic acid when heated with pyridine-acetic anhydride to give dihydroindoles. The 7-acetoxyTHI's were hydrolyzed with potassium hydroxide in methanol-water and carefully neutralized with hydrochloric acid to give the corresponding hydroxyTHI carboxylic acids. Treatment with potassium ferricyanide in refluxing acetic acid gave good yields of tetrapropanoporphyrins when 3-methyl-, 3-ethyl-, or 3-n-propyl substituents were present. The 3-phenylTHI gave variable yields of the corresponding tetraphenylporphyrin. The 3-isopropylTHI gave only trace amounts of porphyrin under these conditions, and the 3-tert-butylTHI failed to give any porphyrin product. THI's with 6-methyl or 6,6-dimethyl substituents were prepared in two steps from 5-methyl-1,3-cyclohexanedione or dimedone, respectively. These compounds also reacted smoothly with lead tetraacetate to give the 7-acetoxy derivatives in high yield. Attempts to convert the 6,6-dimethylTHI's into symmetrical porphyrins were unsuccessful, although the 6-methylTHI gave a mixture of porphyrin stereoisomers in low yield. The influence of alkyl substituents and carbocyclic rings on the cyclotetramerization of THI's is discussed.

  DOI：

  10.1021/jo00044a012
• 作为产物：
  描述：

  3-氧代戊酸甲酯 在 sodium acetate 、 溶剂黄146 、 锌 、 sodium nitrite 作用下， 反应 2.0h， 生成 methyl 3-ethyl-4-oxo-4,5,6,7-tetrahydro-1H-indole-2-carboxylate
  参考文献：
  名称：

  Porphyrins with exocyclic rings. 1. Chemistry of 4,5,6,7-tetrahydro-1H-indoles: synthesis of acetoxy derivatives, dihydroindoles, and novel porphyrins with four exocyclic rings

  摘要：

  A variety of 4,5,6,7-tetrahydro-1H-indoles (THI's) and 4-oxo-4,5,6,7-tetrahydro-1H-indoles (4-oxoTHIs) have been synthesized from cyclohexanone and 1,3-cyclohexanedione, respectively. The THI's reacted regioselectively with lead tetraacetate in acetic acid to give the 7-acetoxy derivatives. The isomeric 4-acetoxyTHI's were prepared by first reducing the corresponding 4-oxoTHI's with sodium borohydride and then reacting the resulting hydroxyTHI' s with acetic acid-pyridine. Both series of acetoxyTHI's underwent elimination of acetic acid when heated with pyridine-acetic anhydride to give dihydroindoles. The 7-acetoxyTHI's were hydrolyzed with potassium hydroxide in methanol-water and carefully neutralized with hydrochloric acid to give the corresponding hydroxyTHI carboxylic acids. Treatment with potassium ferricyanide in refluxing acetic acid gave good yields of tetrapropanoporphyrins when 3-methyl-, 3-ethyl-, or 3-n-propyl substituents were present. The 3-phenylTHI gave variable yields of the corresponding tetraphenylporphyrin. The 3-isopropylTHI gave only trace amounts of porphyrin under these conditions, and the 3-tert-butylTHI failed to give any porphyrin product. THI's with 6-methyl or 6,6-dimethyl substituents were prepared in two steps from 5-methyl-1,3-cyclohexanedione or dimedone, respectively. These compounds also reacted smoothly with lead tetraacetate to give the 7-acetoxy derivatives in high yield. Attempts to convert the 6,6-dimethylTHI's into symmetrical porphyrins were unsuccessful, although the 6-methylTHI gave a mixture of porphyrin stereoisomers in low yield. The influence of alkyl substituents and carbocyclic rings on the cyclotetramerization of THI's is discussed.

  DOI：

  10.1021/jo00044a012

文献信息

• Porphyrins with exocyclic rings. 1. Chemistry of 4,5,6,7-tetrahydro-1H-indoles: synthesis of acetoxy derivatives, dihydroindoles, and novel porphyrins with four exocyclic rings
  作者：Timothy D. Lash、Karla A. Bladel、Craig M. Shiner、Donna L. Zajeski、Rajiv P. Balasubramaniam

  DOI：10.1021/jo00044a012

  日期：1992.8

  A variety of 4,5,6,7-tetrahydro-1H-indoles (THI's) and 4-oxo-4,5,6,7-tetrahydro-1H-indoles (4-oxoTHIs) have been synthesized from cyclohexanone and 1,3-cyclohexanedione, respectively. The THI's reacted regioselectively with lead tetraacetate in acetic acid to give the 7-acetoxy derivatives. The isomeric 4-acetoxyTHI's were prepared by first reducing the corresponding 4-oxoTHI's with sodium borohydride and then reacting the resulting hydroxyTHI' s with acetic acid-pyridine. Both series of acetoxyTHI's underwent elimination of acetic acid when heated with pyridine-acetic anhydride to give dihydroindoles. The 7-acetoxyTHI's were hydrolyzed with potassium hydroxide in methanol-water and carefully neutralized with hydrochloric acid to give the corresponding hydroxyTHI carboxylic acids. Treatment with potassium ferricyanide in refluxing acetic acid gave good yields of tetrapropanoporphyrins when 3-methyl-, 3-ethyl-, or 3-n-propyl substituents were present. The 3-phenylTHI gave variable yields of the corresponding tetraphenylporphyrin. The 3-isopropylTHI gave only trace amounts of porphyrin under these conditions, and the 3-tert-butylTHI failed to give any porphyrin product. THI's with 6-methyl or 6,6-dimethyl substituents were prepared in two steps from 5-methyl-1,3-cyclohexanedione or dimedone, respectively. These compounds also reacted smoothly with lead tetraacetate to give the 7-acetoxy derivatives in high yield. Attempts to convert the 6,6-dimethylTHI's into symmetrical porphyrins were unsuccessful, although the 6-methylTHI gave a mixture of porphyrin stereoisomers in low yield. The influence of alkyl substituents and carbocyclic rings on the cyclotetramerization of THI's is discussed.