Production of pyridine-3-sulfonic acid

Details Production of pyridine-3-sulfonic acid Production of pyridine-3-sulfonic acid

1990-10-31

1992-01-21

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546345, C07D21371, C07D21362

Patent

active

050829440

ABSTRACT:
A method for the production of heavy metal-free pyridine -3-sulfonic acid by oxidation of 3-chloro-pyridine to 3-chloro-pyridine-N-oxide, substitution of the chlorine through a sulfonic acid group, and subsequent reduction to pyridine-3-sulfonic acid. The method can be carried out using raw 3-chloropyridine-N-oxide and direct further reaction of the pyridine-3-sulfonic acid-N-oxide in the presence of Raney nickel in an alkaline solution.

REFERENCES:
Chem. Abstracts, vol. 57(3) pp. 3405-3407 Aug. 6, 1962.
Chem. Abstracts, vol. 66 (9) abst. No. 37,736h, Feb. 27, 1967.
Chem. Abstracts, vol. 79 (15), abst. No. No. 91937f, Oct. 15, 1973.

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