Water → Ethyl 2-(4-(4-Cyano-2-(methylsulfonyl)phenyl)-2,5-dioxo-1-(3-(trifluoromethyl)-phenyl)-6,7-dihydro-1H-cyclopenta[d]pyrimidin-3(2H,4H,5H)-yl)acetate

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Reaction Steps

A mixture of 4-(2,5-dioxo-1-(3-(trifluoromethyl)phenyl)-2,3,4,5,6,7-hexahydro-1H-cyclopenta[d]pyrimidin-4-yl)-3-(methylsulfonyl)benzonitrile (example 10, 1.78 g, 3.74 mmol) and cesium carbonate (1.83 g, 5.62 mmol) in N,N-dimethylformamide (25.0 mL) is treated with ethyl bromoacetate (0.50 mL, 4.50 mml), and the mixture is stirred at room temperature over night. Water (30 ml) is added, and the precipitate is filtered and dried. Yield: 1.80 g; ESI mass spectrum: [M+H]+=562; Retention time HPLC: 1.05 min (Z018_S04).

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