ethyl 5-methyl-3-oxo-1,2-dihydropyrrole-4-carboxylate 、
1-[4-(dimethylaminomethyl)phenyl]-2,5-dimethyl-1H-pyrrole-3-carbaldehyde 在
potassium hydrogensulfate 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以85%的产率得到ethyl (5E)-5-[[1-[4-[(dimethylamino)methyl]phenyl]-2,5-dimethylpyrrol-3-yl]methylidene]-2-methyl-4-oxo-1H-pyrrole-3-carboxylate