N-methyl-2-pyrrolidone → 2-(3-ethylthiophen-2-yl)-3-methyl-6-trifluoromethylthio-3H-imidazo[4,5,b]pyridine

Participants

Reaction Conditions

Reaction Steps

0.32 g of sodium ethanethiolate was added to a mixture of 0.71 g of 2-(3-chloro-thiophen-2-yl)-3-methyl-6-trifluoromethylthio-3H-imidazo[4,5-b]pyridine and 4 ml of NMP, under ice cooling, and the mixture was stirred at 70° C. for 4 hours. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and dried over anhydrous magnesium sulfate, then concentrated under reduced pressure and applied to a silica gel column chromatography to obtain 0.57 g of 2-(3-ethylthiophen-2-yl)-3-methyl-6-trifluoromethylthio-3H-imidazo[4,5,b]pyridine (Compound of Present Invention (3)).

Provenance & Evidence