Lithium cyanide → HCID 13772947, compound

Participants

Reaction Steps

A solution of 6.4 g of 5-chloro-1-(2,4-dichlorophenyl)-1H-pyrazole-4-carboxylic acid, ethyl ester and 2 g of lithium cyanide dissolved in 30 ml of DMF was reacted at approximately 110° C. for 23 hours. One additional gram of lithium cyanide was added to the reaction mixture which was heated for an additional 7 hours. The mixture was poured into ice water and the precipitated solid was collected by filtration and recrystallized from 3A alcohol (charcoal) to provide 3.75 g of 5-cyano-1-(2,4-dichlorophenyl)-1H-pyrazole-4-carboxylic acid, ethyl ester. Yield 61%. mp=79°-81° C.

Provenance & Evidence