Potassium Carbonate → 1-(5-Chloro-2-nitrophenyl)-1H-[1,2,3]triazolo[4,5-b]pyridine

Participants

Reaction Conditions

Reaction Steps

4-Chloro-2-fluoro-1-nitrobenzene (25 g, 142 mmol) and 1H-[1,2,3]triazolo[4,5-b]pyridine (18.8 g, 157 mmol) were slurried in DMF (50 mL) in a 200 mL round-bottom flask fitted with a magnetic stir bar. Potassium carbonate (29.5 g, 214 mmol) was added to the mixture and it was then heates while stirring in a 60°C. oil bath under N2. LCMS analysis after two hours indicated complete consumption of the nitrobenzene and two different isomeric forms of the desired product. Water (250 mL) was subsequently added in a steady stream to the rapidly stirring mixture to precipitate the crude product. The resultant precipitate was collected by vacuum filtration and washed twice with 100 mL water. The resultant damp filter was slurried with 50 mL toluene and the solids collected by vacuum filtration. This action was repeated three additional times and then the resultant solid was dried in vacuo to afford 21.6 g (55% yield) 1-(5-chloro-2-nitrophenyl)-1 H-[1,2,3]triazolo[4,5-b]pyridine as an off-white solid.

Provenance & Evidence