Diethyl Ether → HCID 9869084, compound

Participants

Reaction Steps

To a rapidly stirred solution of 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-iodopyrazole (0.62 g) in toluene (5 ml) containing tetrakis(triphenylphosphine)palladium(0) (0.056 g) was added saturated aqueous sodium hydrogen carbonate solution (5 m) and a solution of 2-trifluoromethylphenylboronic acid (1.32 g) in ethanol (2.5 ml). The mixture was heated under reflux for 1.5 hours, cooled and then poured into ether (60 ml) and water (50 ml). The layers were separated and the aqueous phase extracted with a second portion of ether (60 ml). The combined organic layers were washed with water (2×40 ml), brine (40 ml) and then dried (Na2SO4) and evaporated. The residue was purified by column chromatography on silica gel (50 g) eluted with dichloromethane. Combination and evaporation of suitable fractions gave the title compound as a white crystalline solid, m.p. 210-2° C.

Provenance & Evidence