Hydrochloric Acid → 1-(4-cyanophenyl)-5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-N-(ethylcarbonyl)-1H-pyrazole-4-sulfonamide

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Reaction Conditions

Reaction Steps

1-(4-Cyanophenyl)-5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-1H-pyrazole-4-sulfonamide (prepared in Example 205) (97 mg) was dissolved in acetonitrile (2 ml) and thereto were added ethyl isocyanate (0.043 ml) and diisopropylethylamine (0.065 ml) and the resulting mixture was stirred at 50° C. for four hours. The mixture was cooled to room temperature, and thereto were then added 1N hydrochloric acid (20 ml) and ethyl acetate (30 ml) such that the intended products were extracted into an organic layer. The organic layer was washed with 1N hydrochloric acid (20 ml) and saturated saline (30 ml) successively, dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: chloroform/methanol) to afford 1-(4-cyanophenyl)-5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-N-(ethylcarbonyl)-1H-pyrazole-4-sulfonamide (88 mg).

Provenance & Evidence