methyl 2-((4-oxo-6-(4-(trifluoromethoxy)phenyl)quinazolin-3(4H)-yl)methyl)oxazole-4-carboxylate → 3-((4-(hydroxymethyl)oxazol-2-yl)methyl)-6-(4-(trifluoromethoxy)phenyl)-2,3-dihydroquinazolin-4(1H)-one

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To a solution of methyl 2-((4-oxo-6-(4-(trifluoromethoxy)phenyl)quinazolin-3(4H)-yl)methyl)oxazole-4-carboxylate Compound 177-A (200 mg) in THF (5 mL) lithium borohydride was added (10 mg) and stirred for 1 hour. Quenched with saturated ammonium chloride and extracted with dichloromethane. Purified by gradient chromatography 0 to 5% MeOH in dichloromethane and resulting 3-((4-(hydroxymethyl)oxazol-2-yl)methyl)-6-(4-(trifluoromethoxy)phenyl)-2,3-dihydroquinazolin-4(1H)-one Compound 177-B (130 mg) submitted into next step. 1H NMR (δ, dmso-d6, 400 MHz): 7.92 (d, 1H); 7.86 (s, 1H); 7.71 (d, 2H); 7.65 (dd, 1H); 7.38 (d, 2H); 7.03 (br s, 1H); 6.85 (d, 1H); 5.14 (t, 1H); 4.74 (s, 4H); 4.32 (d, 2H). 19F NMR (δ, dmso-d6, 376 MHz): −57.29 (s). MS m/z (ESI)=420.1 (base peak, M+H+); 861.2 (2M+Na+).

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