| abstract |
The present invention relates to a new route of synthesis for obtaining Opicapone ((4Z)-4-[3-(2,5-dichloro-4,6-dimethyl-1-oxidopyridin-1-ium-3-yl)-2H-1,2,4-oxadia-zol-5-ylidene]-2-hydroxy-6-nitrocyclohexa-2,5-dien-1-one), new intermediates in the reaction path and the new substance 2,5-dichloro-N-hydroxy-4,6-dimethylpyridine-3-carboximidoyl chloride. |