反应详情

Using the same procedure as described for the preparation of 121a, a reaction of 236b (1.04 g, 6.40 mmol) with 3,5-dibromo-1-methylpyridin-2(1H)-one (1.90 g, 7.12 mmol) afforded a 44% yield (980 mg) of 236c as a brown solid: mp 135-136° C.; 1H NMR (500 MHz, DMSO-d6) d 8.49 (d, 1H, J=5.5 Hz), 8.42 (s, 1H), 7.50 (d, 1H, J=4.5 Hz), 7.41 (d, 1H, J=7.0 Hz), 7.20 (d, 1H, J=14.5 Hz), 6.85 (dd, 1H, J=14.5, 5.0 Hz), 3.91 (m, 2H), 3.49 (s, 3H), 3.34 (m, 2H), 2.75 (m, 1H), 1.21 (d, 3H, J=11.5 Hz; MS (ESI+) m/z 350.2 (M+H).