Hydrochloric Acid → 4-(4-(2H-tetrazol-5-yl)phenyl)-5-phenyl-6-(pyridin-3-yl)-3,4-dihydropyrimidin-2(1H)-one

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A mixture of 4-(2H-tetrazol-5-yl)benzaldehyde (106 mg), 2-phenyl-1-(pyridin-3-yl)ethanone (Intermediate 31) (100 mg, 0.51 mmol), urea (120 mg, 2.0 mmol) and conc. HCl (0.2 mL) in EtOH (5 mL) was refluxed under N2 overnight. The mixture was concentrated under reduced pressure and purified by prep-HPLC (0.1% TFA as additive) to give Compound 162 (50 mg, 2-step yield 25%). 1H NMR (DMSO-d6 400 MHz): δ 8.97 (s, 1H), 8.52 (d, J=4.4 Hz, 1H), 8.89 (s, 1H), 8.05-7.97 (m, 2H), 7.85 (d, J=8.0 Hz, 1H), 7.69 (s, 1H), 7.57 (d, J=8.0 Hz, 2H), 7.49-7.44 (m, 1H), 7.07-7.00 (m, 3H), 6.89-6.85 (m, 2H), 5.38 (s, 1H). MS (ESI): m/z 396.4 [M+1]+

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