Trifluoroacetic acid → 4-{[(6-(4-Fluorophenyl)-5-(methoxycarbonyl)-4-methyl-2-oxo-3,6-dihydro-1(2H)-pyrimidinyl)carbonyl]amino}butanoic acid

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Reaction Steps

Into a solution of methyl 1-{[(4-tert-butoxy-4-oxobutyl)amino]carbonyl}-6-(4-fluorophenyl)-2-methoxy-4-methyl-1,6-dihydro-5-pyrimidinecarboxylate (77.3 mg, 0.166 mmol) in dichloromethane (2.00 mL) at 0° C. was slowly added trifluoroacetic acid (189 mg, 1.66 mmol). The reaction mixture was stirred at room temperature for 10 min and concentrated in vacuo. The residue was dissolved in iso-PrOH/CHCl3 (1:3, 10 mL) and basified to pH 11 with 10% KOH solution, washed with H2O, followed by brine. The organic layer was dried over MgSO4 and concentrated in vacuo to afford the desired product (58.1 mg, 88.9%). ESMS m/e: 394.1 (M+H)+.

Provenance & Evidence