Pyridinium intermediates and the process for preparing the same

Details Pyridinium intermediates and the process for preparing the same Pyridinium intermediates and the process for preparing the same

C - Chemistry, Metallurgy

07

C

C07C 63/70 (2006.01) C07C 51/377 (2006.01) C07C 201/12 (2006.01) C07C 205/58 (2006.01) C07D 213/20 (2006.01)

Patent

CA 2135888

A process for the preparation of halobenzoic acids, comprising the step of reacting a halonitrobenzene with a pyridinium salt to form an intermediate of formula (I), wherein R is selected from the group consisting of hydrogen, alkyl, aryl, alkenyl, alkynyl, -CN, -COOR' and -COR' where R' is alkyl or aryl; X is chloro or fluoro; Y is hydrogen, chloro or fluoro; and Z is chloro, bromo or iodo.

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