化学学报 ›› 1994, Vol. 52 ›› Issue (11): 1126-1132. 上一篇    下一篇

研究论文

从容易制备的三氟甲基恶唑酮直接合成三氟甲基吡咯及其有关化合物

田伟生;罗雍容;陈毓群;翟咏红   

  1. 中国科学院上海有机化学研究所
  • 发布日期:1994-11-15

An efficient synthesis of trifluoromethylpyrroles and related compounds from easily prepared trifluoromethyloxazolones

TIAN WEISHENG;LUO YONGRONG;CHEN YUQUN;DI YONGHONG   

  • Published:1994-11-15

作者考察了三氟甲基恶唑酮与缺电子烯烃在不同条件下的反应, 发现了三氟甲基恶唑酮与α-氯代丙烯腈的串联Micheal加成-类Mannich反应-脱羧消除反应.提供了分别通过1,3-偶极环加成反应和串联的环合反应从三氟甲基恶唑酮直接合成三氟甲基吡咯及其有关三氟甲基杂环化合物的方法

关键词: 杀虫剂, 曼尼希反应, 氯代丙烯腈, 三氟甲基恶唑酮, 三氟甲基吡咯, 三氟甲基氰基吡咯, 串联反应

An efficient way for the synthesis of trifluoromethylpyrroles and related compounds from easily prepared trifluoromethyloxazolone via 1,3-dipolar cycloaddn. and the base promoted cyclocondensation reaction was described. E.g., the 1,3-dipolar cycloaddn. of trifluoromethyloxazolones I (R = Ph, 4-ClC6H4) with di-Me acetylenedicarboxylate gave cycloadducts II, which were transformed into trifluoromethylpyrroles III after decarboxylation. The base promoted cyclocondensation involves the tandem Michael addition of trifluoromethyloxazolones to electron-deficient alkenes, intramol. cyclization and decarboxylation to give trifluoromethylpyrroles in good yield.

Key words: INSECTICIDES, MANNICH REACTION

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