4,6-Dichloropyrimidine → 4-Chloro-6-(piperazin-1-yl)pyrimidine

Participants

Reaction Steps

13.3 g tert-butyl 1-piperazinecarboxylate and 11.2 mL DIPEA were added to 10 g 4, 6 dichloro pyrimidine in 1000 mL dichlormethane was stirred over the weekend at RT. The solvent was removed. The residue was dissolved in 200 mL dichlormethane and 200 mL trifluoro acetic acid was added. The reaction was stirred at RT. The solvent was removed. The residue was dissolved in methanol and passed through HCO3 containing resin. The solvent was removed and the residue was purified by chromatographie on silica (dcyclohexane: ethylacetate 0-40%) to yield 13.07 g of the desired product.

Provenance & Evidence