반응 단계
The title compound was prepared according to Method A and the experimentals described for compound 1 from 3-(chloromethyl)-2-(4-chlorophenyl)imidazo[1,2-a]pyridine hydrochloride and ethyl 3-methyl-1H-pyrazole-5-carboxylate. The regioisomers were separated by silica gel chromatography. Compound 28: M/e+ 395 for C21H20ClN4O2 (M+H)+; 1H-NMR (400 MHz, CDCl3) δ 8.24 (d, J=6.9 Hz, 1H), 7.82 (d, J=8.4 Hz, 2H), 7.61 (d, J=8.8 Hz, 1H), 7.36 (d, J=8.4 Hz, 2H), 7.17 (td, J=6.6, 1.1 Hz, 1H), 6.78 (td, J=6.6, 1.1 Hz, 1H), 6.50 (s, 1H), 6.01 (s, 2H), 4.30 (q, J=7.3 Hz, 2H), 2.26 (s, 3H), 1.30 (q, J=7.3 Hz, 3H) ppm; Compound 29: M/e+ 395 for C21H20ClN4O2 (M+H)+; 1H-NMR (400 MHz, CDCl3) δ 8.47 (d, J=6.6 Hz, 1H), 7.64 (d, J=8.4 Hz, 2H), 7.63 (m, 1H), 7.48 (d, J=8.4 Hz, 2H), 7.24 (t, J=6.6 Hz, 1H), 6.84 (t, J=6.6 Hz, 1H), 6.44 (s, 1H), 5.84 (s, 2H), 4.36 (q, J=7.3 Hz, 2H), 1.73 (s, 3H), 1.37 (t, J=3H) ppm.
