Process for the preparation of 5-alkoxy-2-nitroso phenols
US5250741A · kind A · utility
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3Claims
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Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for the preparation of 5-alkoxy-2-nitrosophenols by the nitrosation of 3-alkoxyphenols using an alkali metal nitrite and an alkanoic acid wherein the selectivity of the nitrosation is improved. Also disclosed is a 2-step process for the preparation of 5-alkoxy-2-nitrophenols by oxidizing the 5-alkoxy-2-nitrosophenols obtained in accordance with the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.