Process for producing o-nitrobenzaldehyde

Details Process for producing o-nitrobenzaldehyde Process for producing o-nitrobenzaldehyde

1983-04-14

1984-07-31

Helfin, Bernard

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

Organic compounds

Oxygen containing

560 23, C07C 4527

Patent

active

044631952

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.

REFERENCES:
patent: 3287393 (1966-11-01), Akerstrom
patent: 4203928 (1980-05-01), Meyer
patent: 4297519 (1981-10-01), Ertel

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