Process for producing o-nitrobenzaldehyde
US4463195A · kind A · utility
3Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Apr 14, 1983 |
| Grant date | Jul 31, 1984 |
| Priority date | — |
| Expiry date | Apr 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.