Some new 2-aryl-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-ones have been prepared through cyclocondensation of 2-amino-1H-pyrrole-3-carboxamides with aromatic aldehydes followed by air oxidation in the presence of 3-methyl-1-(4-sulfonic acid)butylimidazolium hydrogen sulfate [(CH2)4SO3HMIM][HSO4], a Brønsted-acidic ionicliquid, as a green and reusablecatalyst in solvent-free conditions.
一些新的2-芳基-3,7-二氢-4 H-吡咯并[2,3-d]嘧啶-4-酮是通过2-氨基-1 H-吡咯-3-羧酰胺与芳族醛的环缩合反应制得的布朗斯台德酸性离子液体3-甲基-1-(4-磺酸)丁基咪唑鎓硫酸氢盐[(CH 2)4 SO 3 HMIM] [HSO 4 ]的存在下,通过空气氧化制备绿色可重复使用的催化剂在无溶剂的条件下。