Sodium Bicarbonate → 2-(3-fluoropyridin-2-yl)-3-methyl-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine

Participants

Reaction Conditions

Reaction Steps

A mixture of N2-methyl-5-trifluoromethylpyridin-2,3-diamine (0.76 g), 3-fluoropyridin-2-carboaldehyde (0.50 g), sodium hydrogen sulfite (0.50 g) and DMF (3 ml) was stirred at 120° C. for 8 hours. To the cooled reaction mixture was added saturated aqueous sodium hydrogen carbonate solution, and extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 2-(3-fluoropyridin-2-yl)-3-methyl-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (0.43 g), which is hereinafter referred to as “intermediate compound (M6-2)”.

Provenance & Evidence