Ethanolamine → USRE47493, Example 61

Participants

Reaction Steps

Triethylamine (55 μL, 0.40 mmol) is added to a solution of 2-(4-(4-cyanophenyl)-2,5-dioxo-1-(3-(trifluoromethyl)phenyl)-1,2,5,6,7,8-hexahydroquinazolin-3(4H)-yl)-propanoic acid (intermediate 59, 50 mg, 0.10 mmol) in N,N-dimethylformamide, and the mixture is stirred for 10 min at room temperature. N,N,N′,N′-Tetramethyl-O-(benzotriazol-1-yl)uronium tetrafluoroborate (33 mg, 0.10 mmol) is added, and the mixture is stirred for 15 min. Ethanolamine (15 μL, 0.25 mml) is added, and the mixture is stirred for 1 h, diluted with N,N-dimethylformamide and purified by preparative HPLC (Waters SunFire™-C18, gradient of acetonitrile in water, 0.1% TFA). Yield: 39 mg; ESI mass spectrum [M+H]+=527; Retention time HPLC: 0.86 min (Z018_S04).

Provenance & Evidence