反应详情

A stirred mixture of 8-amino-2,3-dimethyl-6-fluoroimidazo[1,2-a]pyridine (0.16 g, 0.89 mmol), zinc(II) chloride (0.14 g, 1.04 mmol) and 2,6-dimethylbenzaldehyd (0.14 g, 1.04 mmol) in methanol (50 ml) was treated with sodium cyanoborohydride (0.065 g, 1.04 mmol) and was refluxed for 7 h. The cooled reaction mixture was added to 0.5 M NaOH (20 ml) and the precipitated solids were filtered off and purified by column chromatography on silica gel, using methanol:methylene chloride (1:10) as eluent. Crystallization from petroleum ether gave 0.1 g (38%) of the title compound.

1. temperaturewas refluxed for 7 h
2. customThe cooled reaction mixture
3. filtrationthe precipitated solids were filtered off
4. custompurified by column chromatography on silica gel
5. customCrystallization from petroleum ether