HCID 53629213, compound → HCID 53629214, compound

Participants

Reaction Steps

To a solution of 5,7-dichloro-2-cyclopropylpyrazolo[1,5-a]pyrimidine x272 (26.7 mmol, 1 eq., 6.08 g) in 125 ml of AcOH is added Zn powder (0.107 mol, 4 eq, 6.97 g). The mixture is then stirred for 48 hours at room temperature. After this time, the solvent is evaporated under reduce pressure and the reaction mixture poured on water, quenched with NaHCO3, and extracted with dichloromethane. The organic layer is dried over Na2SO4, filtered and evaporated under reduced pressure. The crude product is purified by chromatography on silicagel (CH2Cl2/hexane: 50/50) to afford 5-chloro-2-cyclopropylpyrazolo[1,5-a]pyrimidine x274 as a solid (3.60 g).

Provenance & Evidence