Method for the production of nuclear substituted cinnamoylanthranilic acid derivatives
US4486597A · kind A · utility
3Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1984 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Feb 7, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/027
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an improved method for producing a nuclear substituted cinnamoylanthranilic acid compound. Illustrative of the process is the reaction of 3,4-dimethoxybenzaldehyde with 2-carboxymalonanilic acid in an inert solvent medium in the presence of piperidine to provide an intermediate salt precipitate, and the salt is treated with an acidic reagent to yield N-(3,4-dimethoxycinnamoyl)anthranilic acid product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.