ethyl 5-methyl-3-oxo-1,2-dihydropyrrole-4-carboxylate 、
2,5-dimethyl-1-(1-propylpiperidin-4-yl)-1H-pyrrole-3-carbaldehyde 在
potassium hydrogensulfate 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以14%的产率得到(E)-ethyl 5-((2,5-dimethyl-1-(1-propylpiperidin-4-yl)-1H-pyrrol-3-yl)methylene)-2-methyl-4-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate