反应详情

By the procedure described in Example 3, with the exception that 3-chloro-4-aminopyridine was used instead of 2-fluoro-4-(methylsulfonyl)aniline, isopropyl 4-(4-chloro-6H-pyrimido[5,4-b][1,4]oxazin-8(7H)-yl)piperidine-1-carboxylate from Example 20A was converted into Example 120. 1H NMR (500 MHz, CDCl3) δ ppm 1.24 (d, J=6.60 Hz, 6H) 1.59-1.64 (m, 2H) 1.66-1.74 (m, 2H) 2.85-2.93 (m, 2H) 3.44-3.47 (m, 2H) 4.25-4.29 (m, 4H) 4.80-4.87 (m, 1H) 4.87-4.94 (m, 1H) 7.60 (s, 1H) 8.09 (s, 1H) 8.31 (d, J=6.05 Hz, 1H) 8.44 (s, 1H) 8.75 (d, J=5.50 Hz, 1H). LRMS (ESI): 433.3/435.2 [M+H]+.