Hydrochloric Acid → HCID 22418338, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 2.90 g (21.6 mmoles) of cupric chloride in a mixture of 20 mL of acetonitrile and 40 mL of acrylonitrile was added 2.73 mL (2.37 g, 23.0 mmoles) of t-butyl nitrite. The resulting black solution was cooled to 0° C., and a solution of 6.66 g (14.7 mmoles) of 1-(2,6-dichloro-4-trifluoromethylphenyl)-2-amino-3-trifluoromethylthio-4-cyano-5-chloropyrrole prepared according to EXAMPLE 8 in 25 mL of acetonitrile was added dropwise and with stirring over a period of 20 minutes. The mixture was allowed to stir for 4 hours at room temperature and was then poured into 400 mL of 1N aqueous HCl and partitioned successively with dichloromethane and water. The organic extracts were dried over anydrous MgSO4 and concentrated. The residual brown oil was chromatographed on silica gel eluting initially with 2:1 and then 1:1 v/v dichloromethane-hexane to give 5.30 g (69%) of 1 -(2,6-dichloro-4-trifluoromethylphenyl)-2-(2-chloro-2-cyanoethyl)-3-trifluoromethylthio-4-cyano-5-chloropyrrole.

Provenance & Evidence