Diisopropylethylamine → (R)-4-(4-Cyanophenyl)-2,5-dioxo-N-(1,1-dioxo-hexahydro-1lambda6-thiopyran-4-yl)-1-(3-(trifluoromethyl)phenyl)-4,5,6,7-tetrahydro-1H-cyclopenta[d]pyrimidine-3(2H)-carboxamide

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Reaction Steps

N,N-Diisopropylethylamine (137 μL, 0.81 mmol), 4-dimethylaminopyridine (27 mg, 0.22 mmol) and 4-nitrophenyl chloroformate (45 mg, 0.22 mmol) is added to a solution of (R)-4-(2,5-dioxo-1-(3-(trifluoromethyl)phenyl)-2,3,4,5,6,7-hexahydro-1H-cyclopenta[d]-pyrimidin-4-yl)benzonitrile (example 1A, 80 mg, 0.20 mmol) in acetonitrile (2.0 mL), and the mixture is stirred at room temperature over night. 1,1-Dioxotetrahydro-2H-thiopyran-4-amine (74 mg, 0.40 mmol) is added, and the mixture is stirred for 1 h and purified by reversed phase HPLC (Waters SunFire™-C18, gradient of acetonitrile in water, 0.1% TFA). Yield: 72 mg; ESI mass spectrum [M+H]+=573; Retention time HPLC: 1.01 min (Z018_S04).

Provenance & Evidence