Piperazine → 4-Chloro-6-(piperazin-1-yl)pyrimidine hydrochloride
Reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[N:5]=[CH:4][N:3]=1.[NH:9]1[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]1>C(#N)C>[ClH:1].[Cl:8][C:6]1[N:5]=[CH:4][N:3]=[C:2]([N:9]2[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]2)[CH:7]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 2.5 °C
Procedure
A solution of 14.8 g of 4,6-dichloropyrimidine in 100 ml of acetonitrile is cooled to 0-5° C., a solution of 20 g of anhydrous piperazine in 200 ml of acetonitrile is added over 30 minutes and the mixture is left with stirring at 0-5° C. for 2 hours. It is concentrated under vacuum, the residue is taken up with 100 ml of 2N NaOH and extracted with ether, the organic phase is dried over Na2SO4 and the solvent is evaporated under vacuum. The hydrochloride is formed, giving 15 g of the expected product.