Ammonium Chloride → 3-methyl-2-(2-methylsulfanylphenyl)-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine

Participants

Reaction Conditions

Reaction Steps

A mixture of N2-methyl-5-trifluoromethylpyridin-2,3-diamine (1.34 g), 2-methylsulfanylbenzaldehyde (1.28 g), sodium hydrogen sulfite (2.19 g), and DMF (14 ml) was stirred with heating at 80° C. for 1 hour, and then heated to 120° C., and stirred with heating for further 3 hours. Into the reaction mixture cooled to room temperature, saturated aqueous ammonium chloride solution was poured, and extracted with ethyl acetate 3 times. The combined organic layer was dried over magnesium sulfate, and concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography to give 0.74 g of 3-methyl-2-(2-methylsulfanylphenyl)-6-trifluoromethyl-3H-imidazo[4,5-b]pyridine (hereinafter referred to as Present Compound 1).

Provenance & Evidence