1-Methylimidazolium hydrogen sulfate/chlorotrimethylsilane: An effective catalytic system for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and hydroquinazoline-2,5-diones
作者:Hassan Kefayati、Fatereh Asghari、Raheleh Khanjanian
DOI:10.1016/j.molliq.2012.01.019
日期:2012.8
Brønsted acidic ionic liquid, 1-methylimidazolium hydrogen sulfate, in the presence of catalytic amount of chlorotrimethylsilane has been used as an efficient and reusable catalyst for the one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones and hydroquinazoline-2,5-diones under thermal and solvent-free conditions. High yields of the products were obtained in a few minutes by using this new catalysis
在催化量的氯三甲基硅烷存在下,布朗斯台德酸性离子液体1-甲基咪唑硫酸氢盐已被用作一种有效且可重复使用的催化剂,用于一锅合成3,4-二氢嘧啶-2(1 H)-一和氢喹唑啉-2,5-二酮在无溶剂和热的条件下。通过使用这种新的催化系统,在几分钟内即可获得高收率的产品。