Production of N-substituted aromatic hydroxylamine
US11220484B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 30, 2018 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Jan 30, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D257/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An economic, one-step method for the production of N-substituted aromatic hydroxylamines of formula (I) R—N(OH)—C(═O)—(O)R1 (I), with hydrogen, by catalytic hydration with possibly modified hydration catalysts in an aprotic solvent and in the presence of a halogen formic acid ester and in some cases in the presence of a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.