The Biginelli Reaction with an Imidazolium-Tagged Recyclable Iron Catalyst: Kinetics, Mechanism, and Antitumoral Activity
作者:Luciana M. Ramos、Bruna C. Guido、Catharine C. Nobrega、José R. Corrêa、Rafael G. Silva、Heibbe C. B. de Oliveira、Alexandre F. Gomes、Fábio C. Gozzo、Brenno A. D. Neto
DOI:10.1002/chem.201204314
日期:2013.3.25
The present work describes the synthesis, characterization, and application of a new ion‐tagged iron catalyst. The catalyst was employed in the Biginelli reaction with impressive performance. High yields have been achieved when the reaction was carried out in imidazolium‐based ionic liquids (BMI⋅PF6, BMI⋅NTf2, and BMI⋅BF4), thus showing that the ionic‐liquid effects play a role in the reaction. Moreover
本工作描述了新型离子标记铁催化剂的合成,表征和应用。该催化剂用于Biginelli反应中,具有令人印象深刻的性能。当反应在咪唑鎓基的离子液体进行(BMI高的产率已经达到⋅ PF 6,BMI ⋅ NTF 2,和BMI ⋅ BF 4),因此表明离子液体效应在反应中起作用。此外,离子标记的催化剂可以回收并重复使用多达八次,而活性没有任何明显的损失。通过使用高分辨率电喷雾电离四极杆飞行时间质谱(HR-EI-QTOF)光谱和动力学实验进行的机理研究表明,只有一种反应途径可以排除发展条件下的其他两种可能性。理论计算符合所提出的铁催化剂的作用机理。最后,Biginelli反应的产物37种二氢嘧啶酮衍生物在针对MCF-7癌细胞线的测定中评估了其细胞毒性,并获得了令人鼓舞的结果,其中某些衍生物对健康细胞线(成纤维细胞)几乎无毒。