PROCEDIMIENTO PARA LA OBTENCION DE DERIVADOS DE LA 4-BROMO-ANILINA.

    公开(公告)号:ES2250425T3

    公开(公告)日:2006-04-16

    申请号:ES01947430

    申请日:2001-06-29

    Applicant: BASF AG

    Abstract: Procedimiento para la obtención de derivados de la 4-bromo-anilina de la fórmula I en la que los substituyentes tienen los siguientes significados: R1 significa alquilo con 1 a 6 átomos de carbono, halógenoalquilo con 1 a 6 átomos de carbono, alcoxi con 1 a 6 átomos de carbono, halógenoalcoxi con 1 a 6 átomos de carbono, cicloalquilo con 3 a 8 átomos de carbono, halógeno, R2 significa alquilo con 1 a 6 átomos de carbono, alcoxi con 1 a 6 átomos de carbono, cicloalquilo con 3 a 8 átomos de carbono, alquenilo con 2 a 6 átomos de carbono, ciano o un resto heterocíclico, en la que R1 y R2 tienen los significados anteriormente indicados, con un agente para la bromación, en piridina a modo de disolvente, o en una mezcla de disolventes con al menos un 55% en peso de piridina.

    145.
    发明专利
    未知

    公开(公告)号:BR0316844A

    公开(公告)日:2005-10-18

    申请号:BR0316844

    申请日:2003-12-01

    Applicant: BASF AG

    Abstract: A process for preparing benzophenones of the formula I, where X may be chlorine, hydroxyl, methoxy or C 1 -C 6 -alkylcarbonyloxy, and Y may be chlorine or bromine, by reacting an acid chloride of the formula II where X and Y are as defined above with 3,4,5-trimethoxytoluene, which comprises carrying out the reaction in the presence of a) an aromatic hydrocarbon as a diluent and b) from 0.01 to 0.2 mol % of an iron catalyst, based on the acid chloride, c) at a temperature between 60° C. and the boiling point of the particular diluent.

    147.
    发明专利
    未知

    公开(公告)号:BR0307533A

    公开(公告)日:2004-12-21

    申请号:BR0307533

    申请日:2003-02-06

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing 2-chloromethylphenyl acetic acid derivatives of formula (I), in which X represents C1-C4 alkoxy or methylamino, by cleaving the ether bonds in compounds of formula (II), in which R represents C1-C4 alkyl, C1-C4 alkoxy, C1-C2 alkyl halide, C1-C4 alkylcarbonyl, C1-C4 alkylcarbonyloxy, halogen, nitro or cyano, and X has the above-mentioned meaning. The inventive method is characterized in that the transformation takes place in the presence of hydrogen chloride and of an inert solvent, and in that a catalyst selected from the group comprised of: iron, indium or halogenides, oxides or triflates thereof is added to the reaction mixture.

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