3-(Trifluoromethyl)aniline → HCID 178468329, compound

Participants

Reaction Conditions

Reaction Steps

3-(Trifluoromethyl)aniline (34.6 g, 215 mmol) was dissolved in a mixture of concentrated hydrochloric acid (64 mL) and water (64 mL). To the resulting mixture was added dropwise at 0° C. a solution of sodium nitrite (16.6 g, 240 mmol) in water (100 mL). The mixture was stirred for 1 h at 0° C. To the resulting diazonium salt solution was added dropwise a solution of pentane-2,4-dione (22.0 g, 220 mmol) and sodium acetate (52.5 g, 640 mmol) in ethanol (225 mL) and water (80 mL) at room temperature. The mixture was stirred for 18 h at room temperature with a mechanical stirrer. The orange precipitate was filtered off and washed with water (150 mL×3), 50 percent aqueous ethanol (100 mL×2), and n-hexane (100 mL), and then dried in vacuo at 50° C. for 5 h affording 52.7 g (90%) of 3-{[3-(trifluoromethyl)phenyl]hydrazono}pentane-2,4-dione as an orange solid.

Provenance & Evidence