Triethylamine → 4-(2,5-Dioxo-3-(2-oxo-2-thiomorpholinoethyl)-1-(3-(trifluoromethyl)phenyl)-2,3,4,5,6,7-hexahydro-1H-cyclopenta[d]pyrimidin-4-yl)benzonitrile

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Reaction Steps

A solution of 2-(4-(4-cyanophenyl)-2,5-dioxo-1-(3-(trifluoromethyl)phenyl)-6,7-dihydro-1H-cyclopenta[d]pyrimidin-3(2H,4H,5H)-yl)acetic acid (example 4, 30 mg, 66 μmol) and triethylamine (30 μL, 0.22 mmol) in N,N-dimethylformamide (1.25 mL) is treated with N,N,N′,N′-tetramethyl-O-(benzotriazol-1-yl)uronium tetrafluoroborate (21 mg, 66 μmol) and stirred at room temperature for 15 min. This mixture is then added to a solution of thiomorpholine (13 mg, 0.13 mmol) in N,N-dimethylformamide (0.25 mL) and stirred for 72 h. The mixture is filtered and the filtrate is purified by reversed phase HPLC (Waters Xbridge™-C18, gradient of methanol in water, 0.1% NH3). Yield: 20 mg; ESI mass spectrum [M+H]+=541; Retention time HPLC: 1.17 min (001_CA03).

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