Process for synthesizing 2-sulphanilamido-3-methoxypyrazine
US4299962A · kind A · utility
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Key dates
| Filing date | Jan 22, 1980 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Jan 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D241/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Sulphanilamido-3-methoxypyrazine is produced in high purity and good yield, by reacting 2,3-dichloropyrazine with sulphanilamide in the presence of potassium carbonate, an aprotic solvent such as dimethylformamide and a second solvent such as toluene which is inert toward the reagents and is adapted to remove the water of reaction.
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