Potassium tert-butoxide → USRE47493, Example 4

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Reaction Steps

Potassium tert-butoxide (49 mg, 0.44 mmol) is added to a solution of 1-((4-cyanophenyl)-(8-methoxy-10-oxo-3-oxaspiro[5.5]undec-8-en-9-yl)methyl)-3-(3-(trifluoromethyl)phenyl) urea (intermediate 11, 224 mg, 0.44 mmol) in N,N-dimethylformamide (3 mL). The mixture is stirred at room temperature over night and then purified by reversed phase HPLC (Waters Xbridge™-C18, gradient of acetonitrile in water, 0.1% TFA). Yield: 21 mg; ESI mass spectrum [M+H]+=482, Retention time HPLC: 1.04 min (V011_S01).

Provenance & Evidence