Method of preparing N-acyl anthranilamide
US10807967B2 · kind B2 · utility
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Key dates
| Filing date | Nov 25, 2019 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Nov 25, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D401/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a method of preparing N-acyl anthranilamide (I), including: reacting a substituted anthranilic acid (II) with pyrazolecarboxylic acid (III) under the action of a phosphorus reagent and a base to obtain an intermediate benzoxazinone (IV); and subjecting the intermediate benzoxazinone (IV) and a protonic acid salt of methylamine to a ring-opening reaction to obtain N-acyl anthranilamide (I), as shown in the following reaction scheme:
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