Process for the preparation of pyridinium intermediates

Details Process for the preparation of pyridinium intermediates Process for the preparation of pyridinium intermediates

1992-08-21

1994-03-15

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21390

Patent

active

052947211

ABSTRACT:
A process for the preparation of halobenzoic acids, comprising the step of reacting a halonitrobenzene with a pyridinium salt to form an intermediate of the formula ##STR1## 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.

REFERENCES:
patent: 4730000 (1988-03-01), Chu
patent: 4833270 (1989-05-01), Bitha et al.
March, Advanced Organic Chemistry, 2nd Edition 1985 pp. 485-489.

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