Process for producing 3-hydroxy-5-halopyridines

Details Process for producing 3-hydroxy-5-halopyridines Process for producing 3-hydroxy-5-halopyridines

1978-06-29

1980-03-11

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21302

Patent

active

041929462

ABSTRACT:
A process for the production of 3-hydroxy-5-chloropyridine and 3-hydroxy-5-bromopyridine is disclosed which process comprises reacting 2-furfurylamine in aqueous mineral-acid solution at -20.degree. to +5.degree. C. with chlorine or bromine, neutralizing the hydrohalic acid formed, heating the reaction mixture at reflux temperature, and isolating the formed 3-hydroxy-5-halopyridine. The 3-hydroxy-5-halopyridines obtained are intermediates for the production of insecticides.

REFERENCES:
patent: 3808218 (1974-04-01), Kristinsen
patent: 3850943 (1974-11-01), Bowden et al.
Recueil 69, 1281 (1950).
Recueil 70, 185 (1951).
Chem. Abstracts, vol. 58, 1438f.

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