反应详情

3,5-Dibromo-1-methylpyrazin-2(1H)-one (2.21 g) was reacted with 4-morpholinoaniline (1.48 g) using the same general procedure as Example 107a, whereby 108a was obtained as a grey solid in 115% crude yield (3.46 g): 1H NMR (500 MHz, DMSO-d6) δ 9.49 (s, 1H), 7.87 (d, 2H, J=8.0 Hz), 7.31 (s, 1H), 7.21 (m, 2H), 3.83 (m, 4H), 3.43 (s, 3H), 3.27 (m, 4H); MS (ESI+) m/z 365 (M+H). This material contained 18 wt % of DL-10-camphorsulfonic acid. Corrected yield 2.83 g (94%).