Process for oxidizing halopyridines to halopyridine-N-oxides

Details Process for oxidizing halopyridines to halopyridine-N-oxides Process for oxidizing halopyridines to halopyridine-N-oxides

1983-06-24

1985-03-12

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21361

Patent

active

045046670

ABSTRACT:
Described is a process for oxidizing 2-chloropyridine or 2-bromopyridine to the corresponding N-oxide with peracetic acid generated in-situ from H.sub.2 O.sub.2 and acetic acid in the presence of a catalyst selected from the group consisting of maleic acid, maleic anhydride, phthalic anhydride, and mixtures thereof.

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patent: 3892760 (1975-07-01), Pitts
patent: 3954781 (1976-05-01), Pitts
patent: 4080329 (1978-03-01), Muntwyler
G. C. Finger and L. D. Starr, "Aromatic Fluorine Compounds IX. 2-Fluoro-pyridines", J. Am. Chem. Soc., vol. 81, pp. 2674-2675, (Jun. 5, 1959).
R. F. Evans and J. C. Brown, J. Organic Chemistry, vol. 27, pp. 1329 et seq., (1962).
Katritzky, J. Chem. Soc., vol. 1957, pp. 191 et seq.
D. Sarantakis, J. K. Sutherland, C. Tortorella & V. Tortorella; "2 Fluoropyridine-N-Oxide in Peptide Chem.", Chem. Comm., No. 4, pp. 105-106, (1966).
R. J. Kennedy and A. M. Stock, "The Oxidation of Organic Substances by Potassium Peroxymonosulfate", J. or Organic Chem., vol. 25, 1901, (1960).
Literature Search 80-136; Olin Corporation, Jul. 21, 1980.
Correspondence relating to work done by Olin Corporation, FMC and DuPont in the early 1960's.

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