A solution of 500 mg 6-(4-(trifluoromethoxy)phenyl)quinazolin-4(3H)-one, 340 mg of methyl 2-(chloromethyl)oxazole-4-carboxylate, and 220 mg potassium carbonate in 5 mL of DMA was heated at 80° C. for 16 h. The reaction was diluted with water and dichloromethane, aqueous layer washed with dichloromethane, combined organic layers dried over sodium sulphate and concentrated. The residue was recrystallized from acetonitrile to produce methyl 2-((4-oxo-6-(4-(trifluoromethoxy)phenyl)quinazolin-3(4H)-yl)methyl)oxazole-4-carboxylate Compound 177-A as a white solid (420 mg). MS m/z (ESI)=446.0 (base peak, M+H+); 891.1 (2M+H+); 913.1 (2M+Na+).
