Processes for preparing 3-phenyl-2,4(1H, 3H)-pyrimidinediones
US6617282B2 · kind B2 · utility
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Key dates
| Filing date | Sep 26, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Sep 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D403/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing 3-phenyl-2,4(1H,3H)-pyrimidinediones having the general formula I and their salts which comprises reacting the isocyanates represented by the general formula (II) and the substituted hydrazono esters represented by the general formula (III) in the presence of a base.These compounds are useful as herbicides, defoliants and desiccants.
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