3-Fluoroanisole → (2-Fluoro-4-methoxy-phenyl)-(4-trifluoromethyl-phenyl)-methanone

Beteiligte Stoffe

Reaktionsschritte

1.4 l of nitrobenzene were cooled in an ice bath and treated in succession at a maximum temperature of 6° C. with 492.6 g (3.656 mol) of aluminum chloride and 700 g (3.355 mol) of 4-trifluoromethyl-2-fluoro-benzoyl chloride in 350 ml of nitrobenzene. The mixture was stirred (15 min) and 427.5 g (3.388 mol) of 3-fluoroanisole were added slowly so that the temperature did not rise above 6° C. The solution was left to warm to room temperature, stirred 2 h at this temperature, poured on to ice-water (2.5 l) and extracted with methylene chloride. The organic phase was washed with water and concentrated. After crystallization from THF (1.2 l)/hexane (4.2 l), 237 g (24%) of (2-Fluoro-4-methoxy-phenyl)-(4-trifluoromethyl-phenyl)-methanone were obtained, MS: 298 (M).

Herkunft & Nachweise