Phthalic Anhydride → 2-(2,4-dichlorobenzoyl)benzoic acid

Participants

Reaction Steps

To a solution prepared by adding 30 g (0.2 mol.) of phthalic anhydride to 146 g (1.0 mol.) of dried 1,3-dichlorobenzene, was added 64 g (0.48 mol.) of well-ground anhydrous aluminium chloride with stirring. The mixture was heated and stirred for 3 hours on the oil bath kept at 120° C. Thereafter, the reaction mixture was sufficiently cooled on an ice bath and thereto, 100 ml of water was added dropwise. The thus produced white precipitate was thoroughly washed with successive, water and cooled ethanol to obtain 32 g of crude crystals. These crude crystals were recrystallized from benzene to obtain the marked compound. Yield 24 g, Melting Point 178° to 181° C.

Provenance & Evidence