Method for producing 2-halopyridine-n-oxide
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United States of America Patent
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Jul 1, 2003
Grant Date -
N/A
app pub date -
Dec 26, 2000
filing date -
Jul 30, 1998
priority date (Note) -
Expired
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Abstract
The present invention concerns a process for the preparation of 2-halopyridine N-oxide by reaction of 2-halopyridine with hydrogen peroxide in aqueous solution in the presence of an acid anhydride as catalyst in which, according to the invention, as catalyst there is used an anhydride of the formula I ##STR1## whereby the aromatic rings can be substituted by alkyl groups or halogens or can be anellated with a further aromatic ring.
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