Process for producing o-nitrobenzaldehyde
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United States of America Patent
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Jul 31, 1984
Grant Date -
N/A
app pub date -
Apr 14, 1983
filing date -
Apr 19, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Ortho-nitrobenzaldehyde, a well known compound suitable as an indicator and as an intermediate for many organic syntheses including production of pharmaceuticals, is obtained by contacting a C.sub.1 -C.sub.4 lower alkyl ester of o-nitrophenyl pyruvic acid in the form of its enolate, i.e. the enol salt or enol ester, with hydrogen peroxide; the enol salt can be the enolate of an alkali metal, an alkaline earth metal or of aluminum, and the enol ester can be the ester formed by the enolic hydroxyl and formic, acetic, propionic or butyric acid.
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