Sodium Acetate → 4-(3,5-Dichlorophenyl)-6-ethyl-2-(methylthio)-1,4-dihydropyrimidine-5-carboxylic acid methylester

Participants

Reaction Steps

1.00 g (3.48 mmol) of 3-(3,5-dichlorophenyl)-2-propionyl-acrylic methylester was dissolved in 10 ml of DMF. 776 mg (2.79 mmol) of methylisothiourea-sulfate and 428 mg (5.22 mmol) of sodium acetate were added at room temperature and stirred at the same temperature for 2 days. After DMF was evaporated under reduced pressure, the reaction mixture was diluted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was dissolved in toluene and catalytic amount of silica gel was added and stirred at 100° C. for one day. After filtering silica gel, the filtrate was concentrated under reduced pressure. The residue was purified by the silica gel chromatography (hexane/ethyl acetate=10/1 to 2/1) to obtain the title compound.

Provenance & Evidence