The cyclocondensation of trifluoromethyloxazolones with electron-deficient alkenes in the presence of base gives 2-trifluoromethylpyrroles and related heterocyclic compounds in good yields; the reaction involves the tandem Michael addition of trifluoromethyloxazotes to electron-deficient alkenes, intramolecular cyclization and decarboxylation.
三
氟甲基
恶唑酮与缺电子烯在碱存在下进行环缩合反应,可以得到 2-三
氟甲基
吡咯和相关
杂环化合物,收率很高;该反应涉及三
氟甲基
恶唑酮与缺电子烯的串联迈克尔加成、分子内环化和脱羧反应。