Catalytic application of task specific ionic liquid on the synthesis of benzoquinazolinone derivatives by a multicomponent reaction
作者:Matiur Rahman、Anirban Sarkar、Monoranjan Ghosh、Adinath Majee、Alakananda Hajra
DOI:10.1016/j.tetlet.2013.11.011
日期:2014.1
derivatives were synthesized by using a catalytic amount of task specific ionic liquid, [1-methyl-3-(4-sulfobutyl)imidazolium-4-methylbenzenesulfonate] through a one-pot multicomponent Biginelli reaction of α-tetralone, aldehyde, and urea/thiourea in excellent yields within a short reaction time. Mechanism studies suggest that the reaction proceeds through iminium intermediate and C2-H of the TSIL plays
通过催化量的特定任务离子液体[1-甲基-3-(4-磺丁基)咪唑鎓-4-甲基苯磺酸盐],通过一锅多组分α-丁酮的Biginelli反应合成苯并喹唑啉-2-酮衍生物,醛和脲/硫脲的收率很高,而且反应时间短。机理研究表明,反应通过亚胺中间体进行,并且TSIL的C2-H在其催化活性中起主要作用。该催化剂已重复使用了四次,而催化活性没有任何重大损失。通过使用这种TSIL进行大规模反应,表明该方法可用于批量合成喹唑啉酮衍生物。