Acetic Acid → 10-Amino-2-(5-(4-fluorobenzyl)-1,3,4-oxadiazol-2-yl)-3-hydroxy-7,8,9,10-tetrahydro-7,10-ethanopyrimido[1,2-a]azepin-4(6H)-one

Participants

Reaction Steps

To a mixture of benzyl(3-(benzyloxy)-2-(5-(4-fluorobenzyl)-1,3,4-oxadiazol-2-yl)-4-oxo-6,7,8,9-tetrahydro-7,10-ethanopyrimido[1,2-a]azepin-10(4H)-yl)carbamate, Intermediate 11 (30 mg, 0.048 mmol) in CH2Cl2 (2 mL) was added HBr in acetic acid (0.218 mL, 1.206 mmol) and the mixture stirred at room temperature for 16 h. The mixture was concentrated and dried under high vacuum to afford the title compound (18 mg, 0.038 mmol, 78% yield) as a brown solid. 1H NMR (500 MHz, MeOD) δ ppm 7.39-7.46 (2H, m), 7.08-7.14 (2H, m), 4.38 (2H, s), 4.20 (2H, d, J=3.66 Hz), 2.60 (1H, br. s.), 2.22-2.31 (2H, m), 2.05-2.18 (4H, m), 1.85-1.94 (2H, m). LCMS (M+H)=398.18.

Provenance & Evidence