Patent ID: 6657093
Filing Date: 2003-12-02
Classification: C07B,C07C,C07D

Abstract:
A process for preparing compounds of the formula (II), where the substituents R1 to R5 are each independently H, CH3, straight-chain or branched C1-C8-alkyl, CH(OC1-C5-alkyl)2, CH(C1-C5-alkyl)(OC1-C5-alkyl), CH2(OC1-C5-alkyl), CH(CH3)(OC1-C5-alkyl), C1-C8-alkoxy, N(C1-C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, S(C1-C5-alkyl) or a radical Caryl, alkyl, and the symbols X1 to 5 are each carbon or where neighboring radicals R1 to R5 form the following structural unit, where X6 to X9 and R6 to R9 have the same meaning as X1 to X5 and R1 to R5 and the radical Caryl,alkyl is straight-chain or branched, substituted or unsubstituted C1-C8-alkyl, 1-hydroxyalkyl having from 1 to 8 carbon atoms, CN, 2-hydroxyalkyl having from 2 to 5 carbon atoms, 3-hydroxyalkyl having from 3 to 5 carbon atoms, 1-NHR-alkyl having from 1 to 5 carbon atoms, CH(OC1-C5-alkyl)2, C(C1-C5-alkyl)(OC1-C5-alkyl), CH2(OC1-C5-alkyl), CH(CH3)(OC1-C5-alkyl), C1-C5-alkoxy, N(C1-C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, CO2H, CO2alkyl, (C&boxH;O)0.5, substituted 1-vinylalkyls, CH3â€”C(&boxH;O), Râ€”C(&boxH;O) or CHO, which comprises reacting chloro- or fluoroaromatics of the formula (I) with carbon electro hues and lithium metal.