Toluene → 2'-Chloro-4'-fluoro-biphenyl-2-carboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

To a reaction vessel were added 1-bromo-2-chloro-4-fluorobenzene (25 g), ethyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate (46 g), toluene (125 ml), water (125 ml) and tripotassium phosphate (50.5 g), and purged with argon. To this mixture was added dichlorobis(triphenylphosphine)palladium(II) (1.67 g) and the mixture was stirred in an oil bath at 110° C. for 3 hr. The oil bath was removed, and water (125 ml) was added to the reaction mixture. The mixture was stirred at room temperature for 1 hr, and filtered through celite. The filtrate was partitioned in a separatory funnel. The aqueous layer was extracted with toluene, and the organic layers were combined. The organic layer was washed twice with water (125 ml), dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to give the title compound (41.8 g). The obtained solid was directly used for the next reaction without further purification.

Provenance & Evidence