Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyr

Details Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyr Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyr

1983-07-11

1985-07-16

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21361, C07D21364

Patent

active

045298009

ABSTRACT:
A novel simple process for the preparation of 2-halo-3-nitro-6-alkoxy-pyridines having 1 to 6 alkoxy carbon atoms of high purity comprising adding 2-halo-6-alkoxy-pyridine in portions at 0.degree. to 40.degree. C. to a mixture of concentrated sulfuric acid and concentrated nitric acid to obtain impure 2-halo-3-nitro-6-alkoxy-pyridine, treating the latter with a solution of an alkaline reacting compound in a protic solvent and recovering the said pyridine in substantially pure form which are important intermediates for analgesics.

REFERENCES:
patent: 3547935 (1970-12-01), Diehl et al.

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