N-Iodosuccinimide → HCID 22120912, compound

Participants

Reaction Steps

To a stirred solution of 5-amino-3-cyano-1-(2,6-dichlorophenyl)pyrazole (0.1318 g) in acetonitrile (5 ml) at room temperature was added N-iodosuccinimide (0.1469 g). Stirring was continued for 1 hour and the mixture was then evaporated to dryness. The residue was taken up in dioxane (5 ml). Furan-2-boronic acid (0.1232 g), tetrakis(triphenylphosphine)palladium(0) (0.0554 g) and a solution of potassium carbonate (0.4405 g) in water (2 ml) were added. The mixture was heated under reflux for 48 hours, then cooled and partitioned between ether and water. The separated aqueous layer was extracted with ether and the combined ether layers were washed with brine, dried and evaporated. The green oily residue was purified by column chromatography on silica gel (4 g) eluted with dichloromethane. Combination and evaporation of suitable fractions followed by recrystallisation from toluene gave the title compound as a light brown solid, m.p. 222.6° C.

Provenance & Evidence