Lithium cyanide → HCID 13772947, compound
Reaction equation
Cl[C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([Cl:13])=[CH:9][C:8]=2[Cl:14])[N:5]=[CH:4][C:3]=1[C:15]([O:17][CH2:18][CH3:19])=[O:16].[C-:20]#[N:21].[Li+]>CN(C=O)C>[C:20]([C:2]1[N:6]([C:7]2[CH:12]=[CH:11][C:10]([Cl:13])=[CH:9][C:8]=2[Cl:14])[N:5]=[CH:4][C:3]=1[C:15]([O:17][CH2:18][CH3:19])=[O:16])#[N:21]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
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.