Hydrochloric Acid → HCID 22480374, compound

Participants

Reaction Steps

To a solution of 50 g (0.240 mol) 4,4,4-trifluoro-1-(2-furyl)-1,3-butanedione in 24 ml (0.024 mol) 1M solution of hydrogen chloride in ethanol and further 520 ml EtOH was added. 50 g (0.248 mol) benzylhydrazine dihydrochloride in small portion at room temperature. The reaction mixture was then heated under reflux for 7 h. After cooling to room temperature the reaction mixture was neutralized with saturated NaHCO3, the EtOH was distilled off and the residual oil/water mixture was extracted with 300 ml dichloromethane. The organic phase was washed twice with 100 ml water and dried over Na2SO4 and concentrated in vacuo to give 73.7 g 1-benzyl-5-furan-2-yl-3-trifluoromethyl-1H-pyrazole as a brown oil which was used crude for the next reaction.

Provenance & Evidence