Reaction of 5-alkoxy-3,4-dihalo-2(5H)-furanones with secondary amines: expected versus unanticipated products and their preliminary bioactivity investigations
作者:Yang-Qing Mo、Zhao-Yang Wang、Wen-Jie Mei、Jian-Hua Fu、Yue-He Tan、Shi-He Luo
DOI:10.1007/s00706-011-0594-3
日期:2012.3
AbstractUsing KF as base and THF as solvent, 5-alkoxy-3,4-dihalo-2(5H)-furanones were reacted with secondary amines. The normal products, β-amino-2(5H)-furanones, were obtained via the tandem Michael addition-elimination reaction as expected in most cases. However, the reaction between diisopropylamine and 3,4-dihalo-5-methoxy-2(5H)-furanones yielded unanticipated products, methyl (E)-2-halo-4-(di
摘要以KF为碱,以THF为溶剂,使5-烷氧基-3,4-二卤代-2(5H)-呋喃酮与仲胺反应。正常产物β-氨基-2(5 H)-呋喃酮是大多数情况下通过串联迈克尔加成消除反应获得的。但是,二异丙胺与3,4-二卤-5-甲氧基-2(5 H)-呋喃酮之间的反应生成了未预期的产物,(E)-2-卤-4-(二异丙氨基)-4-氧代丁-2-烯酸酯。提出了可能的涉及重排反应的合成机理。5-烷氧基-3,4-二卤代-2(5 H)反应产物的生物活性测定用MTT法初步研究了不同氨基化合物的呋喃酮对A549细胞的体外杀伤作用,发现某些带有苯环的氨基酸酯衍生物具有最好的抗癌活性。 图形概要