Ethyl Propionate → methyl 3-(1-ethyl-1H-imidazol-2-yl)-4-oxo-2-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate

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Reaction Steps

To 1-ethyl-1H-imidazole-2-carbaldehyde (520 mg, 4.19 mmol), (E)-4-(benzylideneamino) isobenzofuran-1(3H)-one (994 mg, 4.19 mmol), sodium methanolate (385 mg, 16.8 mmol) and ethyl propionate (15 mL) were added and the mixture was stirred at room temperature overnight. Then the resulting mixture was evaporated under reduced pressure and extracted with ethyl acetate (100 mL×4) and concentrated. The crude product was purified by column chromatography (silica gel, petroleum ether/ethyl acetate=20:1 to 5:1). 190 mg of methyl 3-(1-ethyl-1H-imidazol-2-yl)-4-oxo-2-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate was obtained. LC-MS (ESI) m/z: 390 (M+1)+.

Provenance & Evidence