6-(4-methylphenyl)-4-(2-phenylethyl)-2,3-dihydropyridazin-3-one | 186449-54-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 6-(4-methylphenyl)-4-(2-phenylethyl)-2,3-dihydropyridazin-3-one
• CAS: 186449-54-7
• 化学式: C₁₉H₁₈N₂O
• 分子量: 290.365
• InChiKey: SJDTWACSLIRKKS-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  6-(4-methylphenyl)-4-(2-phenylethyl)-2,3-dihydropyridazin-3-one 在 三氯氧磷 作用下， 反应 2.0h， 以71%的产率得到3-Chloro-4-phenethyl-6-p-tolyl-pyridazine
  参考文献：
  名称：

  Dehydration of 2-(2-Arylethyl)-2-hydroxy-4-oxopentanoic Acids and their hydrazones to form heterocycles

  摘要：

  Dehydration of 2-(2-arylethyl)-2-hydroxy-4-oxopentanoic acids 1 with hydrochloric acid/acetic acid, affords 3-(2-arylethyl)-5-hydroxy-5-methyl-2(5H)-furanones 4. Compounds of type 1 and 4 represent suitable precursors for the formation of pyridazin-3-ones 7 as they smoothly react with hydrazine. A new series of s-triazolo[4,3-b]pyridazin-3-ones 12 and tetrazolo[1,5-b]pyridazines 15 are obtained from the 3-chloropyridazines 11 upon treatment with semicarbazide and sodium azide, respectively. Reaction of 11 with phenyl- acetyl-hydrazine provides 3-benzyl-6-phenyl-8-(2-phenyl-ethyl)-s-triazolo [4,3-b]pyridazine 13 via dehydrative cyclization of the intermediate 14 which was clarified to exhibit tautomeric equilibria between enol-hydrazine form A and keto-hydrazine form B by means of H-1 and C-13 NMR spectroscopy. Attempts to synthesize 3-alloxy-pyridazines 18 by reacting 11 with sodium alloxide afford N-allyl compounds 17.

  DOI：

  10.1002/prac.19973390104
• 作为产物：
  描述：

  2-Hydroxy-4-oxo-2-phenethyl-4-p-tolyl-butyric acid 在 一水合肼 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 反应 3.0h， 以75%的产率得到6-(4-methylphenyl)-4-(2-phenylethyl)-2,3-dihydropyridazin-3-one
  参考文献：
  名称：

  Dehydration of 2-(2-Arylethyl)-2-hydroxy-4-oxopentanoic Acids and their hydrazones to form heterocycles

  摘要：

  Dehydration of 2-(2-arylethyl)-2-hydroxy-4-oxopentanoic acids 1 with hydrochloric acid/acetic acid, affords 3-(2-arylethyl)-5-hydroxy-5-methyl-2(5H)-furanones 4. Compounds of type 1 and 4 represent suitable precursors for the formation of pyridazin-3-ones 7 as they smoothly react with hydrazine. A new series of s-triazolo[4,3-b]pyridazin-3-ones 12 and tetrazolo[1,5-b]pyridazines 15 are obtained from the 3-chloropyridazines 11 upon treatment with semicarbazide and sodium azide, respectively. Reaction of 11 with phenyl- acetyl-hydrazine provides 3-benzyl-6-phenyl-8-(2-phenyl-ethyl)-s-triazolo [4,3-b]pyridazine 13 via dehydrative cyclization of the intermediate 14 which was clarified to exhibit tautomeric equilibria between enol-hydrazine form A and keto-hydrazine form B by means of H-1 and C-13 NMR spectroscopy. Attempts to synthesize 3-alloxy-pyridazines 18 by reacting 11 with sodium alloxide afford N-allyl compounds 17.

  DOI：

  10.1002/prac.19973390104