Reaction Steps
Hydrochloric acid in methanol (1.25 M, 5 mL) was added to the (E)-[2-(3-{6-[1-(4-Bromo-phenylcarbamoyl)-4-({1S,4S}-2-oxa-5-aza-bicyclo[2.2.1]hept-5-yl)-butyl]-pyridin-3-yl}-acryloylamino)-phenyl]-carbamic acid tert-butyl ester residue, the mixture was stirred at room temperature for about 12 h, and then NaHCO3 was added to the reaction system. After filtration of solids, the crude mixture was purified by preparative HPLC to obtain white solid. MS: calc'd 590 (MH+), exp 590 (MH+). 1H NMR (d4-MeOD, 400 MHz), 8.76 (d, 1H, J=1.6 Hz), 8.09 (dd, 1H, J=2.0, 8.0 Hz), 7.70 (d, 1H, J=15.6 Hz), 7.61 (d, 1H, J=8.0 Hz), 7.57-7.52 (m, 2H), 7.48-7.43 (m, 2H), 7.21 (d, 1H, J=1.6 Hz), 7.10-7.04 (m, 1H), 6.97 (d, 1H, J=15.6 Hz), 6.90 (d, 1H, J=8.0 Hz), 6.77 (t, 1H, J=8.0 Hz), 4.46 (s, 1H), 4.02 (d, 1H, J=8.4 Hz), 3.95 (t, 1H, J=7.6 Hz), 3.76 (broad s, 1H), 3.66 (d, 1H, J=7.3 Hz), 2.95 (d, 1H, J=10.6 Hz), 2.87 (broad s, 1H), 2.77 (broad s, 2H), 2.24 (broad s, 1H), 2.03 (broad s, 1H), 1.95 (d, 1H, J=10.8 Hz), 1.85 (d, 1H, J=10.8 Hz), 1.63 (broad s, 2H).
