In the present work, we demonstrated a simple and an efficient method for the condensation of substituted aryl/heteroaryl amines with acetonylacetone in the presence of trifluoro acetic acid to afford the corresponding 2,5-dimethyl-1-substitued pyrroles using Paal-Knorr synthesis in excellent yields. Trifluoroacetic acid was used under reflux condition for the deprotection of 2,5-dimethyl-1-substitued pyrroles to their corresponding substituted aryl/heteroaryl amines in moderate yields. 2,5-Dimethyl-1-substitued pyrrole were characterized by NMR and LC-MS. The yield of the compounds was found to be excellent.
在本研究中,我们展示了一种简单有效的方法,通过在
氟代
乙酸的存在下,将取代的芳基/杂芳基胺与乙酰乙酮缩合,得到相应的2,
5-二甲基-1-取代
吡咯,采用Paal-Knorr合成法,收率极佳。
氟代
乙酸在回流条件下用于将2,
5-二甲基-1-取代
吡咯去保护为相应的取代芳基/杂芳基胺,收率为中等。2,
5-二甲基-1-取代
吡咯通过核磁共振(NMR)和
液相色谱-质谱(LC-MS)进行了表征。发现化合物的收率非常好。