5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzenamine → 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-N-propyl-1,2-benzenediamine

Participants

Reaction Conditions

Reaction Steps

A solution of 5.2 g (0.013 mole) 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzenamine in 100 mL acetic acid was heated to 80° C. under a nitrogen atmosphere. The heat and nitrogen were removed and 2.2 g (0.039) mole iron powder was added in 3 portions over 5 min. The solution was stirred at 80° C. for an additional 30 min. The solution was cooled and filtered through Celite®. The filtrate was diluted with 100 mL water and extracted three times with ethyl acetate. The ethyl acetate extracts were washed with a saturated NaHCO3 solution, dried over anhydrous MgSO4, and concentrated in vacuo. The residue was purified chromatographically using 30% ethyl acetate in hexane as the eluent to give 3.85 g (80%) of 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-N-propyl-1,2-benzenediamine as a light yellow oil, nD25 1.5352.

Provenance & Evidence