反应详情

From 4a (yield: 10%); mp: 150-152° C.; IR (KBr) 2100, 1700, 1600, 1280 cm−1; 1H NMR (400 MHz, CDCl3) δ 1.41 (t, 3H, J=7 Hz), 4.39 (q, 2H, J=7 Hz), 6.83 (t, 1H, J=7 Hz), 7.57 (d, 1H, J=1 Hz), 7.61 (d, 1H, J=1 Hz), 7.76 (s, 1H), 8.06 (dd, 1H, J=7, 1 Hz), 8.17 (dd, 1H, J=7, 1 Hz). MS m/z 257 (M+, 1), 229 (61), 183 (100), 155 (31), 129 (23), 104 (14). Further elution gave 8-methylimidazo[1,2-a]pyridine (yield: 10%-Kaiser, C. and al. J. Med. Chem. 1992, 35, 4415-4424).

1. washFurther elution