高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (2): 220.

• 论文 • 上一篇    下一篇

3-芳腙-6-甲基-α,γ-吡喃酮的结构测定及其关环反应研究

李正名1, 邹霞娟1, 么恩云1, 张殿坤1, 王如骥2   

  1. 1. 南开大学元素有机化学研究所, 天津 300071;
    2. 南开大学测试计算中心
  • 收稿日期:1994-02-22 修回日期:1994-04-28 出版日期:1995-02-24 发布日期:1995-02-24
  • 通讯作者: 李正名,男,63岁,教授.
  • 作者简介:李正名,男,63岁,教授.
  • 基金资助:

    国家自然科学基金

Structural Determination of Arylhydrazono-6-methyl-α,γ-Pyronone and Study of Its Ring-Closure Reaction

LI Zheng-Ming1, ZOU Xia-Juan1, YAO En-Yun1, ZHANG Dian-Kun1, WANG Ru-Ji2   

  1. 1. Elemento-Organic Chemistry Institute, Nankai University, Tianjin, 300071;
    2. Analysis and Computer Center, Nankai University
  • Received:1994-02-22 Revised:1994-04-28 Online:1995-02-24 Published:1995-02-24

摘要: 分离并提纯了合成系列哒嗪酮的重要中间体3-芳腙-6-甲基-α,γ-吡喃酮,经X射线衍射法测定其晶体结构.采用核磁共振跟踪对其在酸、碱性条件下反应历程进行了研究,确认它是一个先内酯开环、后脱水关环的反应.

关键词: &alpha, &gamma, -吡喃酮, 哒嗪酮, 催化关环, NMR监测

Abstract: 3-Aryl hydrazono-6-methyl-α,γ-pyronone is an important intermediate for the synthesis of a series of dihydro-pyridazones.This intermediate was separated and purified for the first time.By X-ray diffraction method,its crystalline structure was elucidated.NMR monitoring technique was applied to investigate the following ring-closure reaction under acidic and basic conditions.It was proposed that there underwent a mechanism as first by a lactone ring-opening then followed by a dehydrating cyclization reaction.

Key words: Pyronone, Pyridazone, Catalytic ring-closure, NMR monitoring

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