ethyl 5-methyl-3-oxo-1,2-dihydropyrrole-4-carboxylate 、
2,6-dimethyl-4'-(trifluoromethyl)biphenyl-3-carbaldehyde 在
potassium hydrogensulfate 作用下,
以
乙醇 为溶剂,
反应 3.0h,
以3.6%的产率得到(E)-ethyl 5-((2,6-dimethyl-4'-(trifluoromethyl)biphenyl-3-yl)methylene)-2-methyl-4-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate