Diisopropylethylamine → (+/-)-1-(1-methyl-4-nitro-1H-pyrazol-5-yl)-3-(trifluoromethyl)piperazine

Participants

Reaction Conditions

Reaction Steps

A mixture of (±)-2-(trifluoromethyl)piperazine (1 g, 6.2 mmol), 5-chloro-1-methyl-4-nitro-1H-pyrazole (2.1 g, 13 mmol), DIPEA (2.4 g, 18.6 mmol) in EtOH (10 mL) was heated in a microwave oven at 140° C. for 5 hours. The reaction mixture was concentrated under reduced pressure to give a residue. The residue was purified by silica gel chromatography using DCM/MeOH (10:1) as eluting solvents to afford (±)-1-(1-methyl-4-nitro-1H-pyrazol-5-yl)-3-(trifluoromethyl)piperazine as a yellow oil (1.8 g, 99%). MS (ESI) m/z: 280 [M+H+].

Provenance & Evidence