Hydrochloric Acid → 4-(4-acetyl-5-(3,6-dimethyl-2,4-dioxo-1-(3-(trifluoromethyl)phenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-1H-pyrazol-1-yl)benzonitrile

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(4-bromo-5-(3,6-dimethyl-2,4-dioxo-1-(3-(trifluoromethyl)phenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-1H-pyrazol-1-yl)benzonitrile (prepared in Example 93) (54.6 mg) in 1,4-dioxane (1.0 ml) were added tetrakis(triphenylphosphine)palladium (23.8 mg) and tributyl(1-ethoxyvinyl)tin (103.4 μl) and the resulting mixture was stirred for one hour with heating in microwave instrument (120° C.). To the reaction mixture were then added 1M hydrochloric acid (1 mL) and ethyl acetate (2 ml) and the resulting mixture was stirred at room temperature for one hour. To the reaction mixture was ethyl acetate (50 ml) and the mixture was washed with 10% aqueous potassium carbonate solution (30 ml) and saturated saline (30 ml), dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate) to afford 4-(4-acetyl-5-(3,6-dimethyl-2,4-dioxo-1-(3-(trifluoromethyl)phenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-1H-pyrazol-1-yl)benzonitrile (19.0 mg) as white solid.

Provenance & Evidence