Patent ID: 7250521

Claim:
A process for preparing a 2,5-bisaryl-Δ 1 -pyrroline of the Formula (I) in which Ar 1 represents the radical Ar 2 represents the radical m represents 1, 2, 3 or 4, R 1 represents halogen, cyano, nitro, alkyl, alkoxy, haloalkyl, haloalkoxy, alkoxyalkyl or —S(O) o R 6 , R 2 and R 3 independently of one another represent hydrogen, halogen, cyano, nitro, alkyl, alkoxy, haloalkyl, haloalkoxy, alkoxyalkyl or —S(O) o R 6 , R 4 represents halogen or one of the groupings below (l) —X—A (m) —B—Z—D (n) —Y—E R 5 represents hydrogen, halogen, hydroxyl, cyano, alkyl, alkylcarbonyl, alkoxy, haloalkyl, haloalkoxy, trialkylsilyl, alkoxycarbonyl, —CONR 7 R 8 , —OSO 2 NR 7 R 8 or —S(O) o R 6 , X represents a direct bond, O (oxygen), S(O) o , NR 6 , carbonyl, carbonyloxy, oxycarbonyl, oxysulfonyl (OSO 2 ), alkylene, alkenylene, alkynylene, alkylenoxy, oxyalkylene, oxyalkylenoxy, thioalkylene, cyclopropylene or oxiranylene, A represents phenyl, naphthyl or tetrahydronaphthyl, each of which is optionally mono- or polysubstituted by radicals from the list W 1 , B represents p-phenylene which is optionally mono- or disubstituted by radicals from the list W 1 , Z represents (CH 2 ) n , O (oxygen) or S(O) o , D represents hydrogen, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, alkoxycarbonyl, haloalkylsulfonyl or dialkylaminosulfonyl, Y represents a direct bond, O (oxygen), S (sulfur), SO 2 , carbonyl, carbonyloxy, oxycarbonyl, alkylene, alkenylene, alkynylene, haloalkylene, haloalkenylene, alkylenoxy, oxyalkylene, oxyalkylenoxy or thioalkylene, E represents hydrogen, alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkylsulfonyl, cycloalkyl, dialkylaminocarbonyl or dialkylaminosulfonyl, W 1 represents cyano, halogen, formyl, nitro, alkyl, trialkylsilyl, alkoxy, haloalkyl, haloalkoxy, haloalkenyloxy, haloalkylsulfonyloxy, alkylcarbonyl, alkoxycarbonyl, —S(O) o R 6 , —SO 2 NR 7 R 8 or —OSO 2 NR 7 R 8 , n represents 0, 1, 2, 3 or 4, o represents 0, 1 or 2, R 6 represents hydrogen, alkyl or haloalkyl, R 7 and R 8 independently of one another represent hydrogen, alkyl, haloalkyl, or together represent alkylene, alkoxyalkylene or alkylthioalkylene, comprising: reacting an aroylpyrrolidinone of the Formula (II) in which Ar 1 and Ar 2 are as defined above with an acid, optionally in the presence of a diluent.