Water → 3-Cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-ethenylpyrazole

Participants

Reaction Conditions

Reaction Steps

A solution of 3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)4-iodopyrazole (58 g) in dimethylformamide (350 ml) containing yinyltri-n-butyltin (116 ml) and tetrakis(triphenylphosphine)palladium(0) (3.5 g) was stirred at 75° C. for 3 hours. The reaction nixture was poured into water (600 ml) and ether (600 ml). The organic layer was washed with water (5 times), brine (700 ml) and dried over sodium sulphate. Removal of the solvent in vacuo was followed by recrystallisation of the residue from propan-2-ol, to give the title compound as a pale brown solid, m.p. 75-6° C.

Provenance & Evidence