Efficient synthesis of new 1-alkyl(aryl)-5-(3,3,3-trihalo-2-oxopropylidene)-1H-pyrrol-2(5H)-ones
作者:Alex F.C. Flores、Lucas Pizzuti、Luciana A. Piovesan、Darlene C. Flores、Juliana L. Malavolta、Claudio M.P. Pereira
DOI:10.1016/j.tetlet.2010.07.073
日期:2010.9
The synthesis of 1-alkyl(aryl)-5-(3,3,3-trihalo-2-oxopropylidene)-1H-pyrrol-2(5H)-ones 5, 6a–d from 1-alkyl(aryl)-4-bromo-5-(3,3,3-trihalo-2-oxopropylidene)-1H-pyrrolidin-2-ones 3, 4a–d is reported. The 1-alkyl(aryl)-4-bromo-5-(3,3,3-trihalo-2-oxopropylidene)-1H-pyrrolidin-2-ones 3, 4a–d were obtained from regiospecific bromination of 1-alkyl(aryl)-5-(3,3,3-trihalo-2-oxopropylidene)-1H-pyrrolidin-2-ones
1 -烷基(芳基)的合成-5-(3,3,3-三卤代-2- oxopropylidene)-1 ħ吡咯-2-(5 ħ) -酮5,图6a - d 1 -烷基(芳基)据报道有-4-溴-5-(3,3,3-三卤-2-氧代亚丙基)-1 H-吡咯烷基-2-酮3,4a – d。1-烷基(芳基)-4-溴-5-(3,3,3-三卤-2-氧代亚丙基)-1 H-吡咯烷-2-酮3,4a – d从1-烷基的区域特异性溴化反应中获得(芳基)-5-(3,3,3-三卤-2-氧代亚丙基)-1 H-吡咯烷酮-2-酮1,2a – d与分子溴。NMR和X射线衍射数据显示1-烷基(芳基)-5-(3,3,3-三卤-2-氧代亚丙基)-1 H-吡咯烷二-2-酮在吡咯烷酮中的4-位被溴化。 -2-一环。