Preparation of fluoropyridines

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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546286, C07D21326, C07D21357, C07D21361

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active

045635307

ABSTRACT:
A process for the simultaneous preparation of 2,3-difluoro- and 2,3-dichloropyridines from 3-chloro-2-fluoropyridines which comprises passing a 3-chloro-2-fluoropyridine over a carbon based catalyst, optionally in the presence of HF, at elevated temperatures, thereby forming the corresponding 2,3-dichloro- and 2,3-difluoropyridines.

REFERENCES:
patent: 3370062 (1968-02-01), Corran
patent: 4490534 (1984-12-01), Fujikawa et al.

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