Method of preparing pyridinyloxyphenols and derivatives
US4275212A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Nov 13, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/68
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pyridinyloxphenol compounds and derivatives are prepared by reacting a 2(6)- or 4-substituted pyridine intermediate with a hydroquinone reactant and a base, an excess molar amount of base as compared to the molar amount of hydroquinone reactant being employed along with a requisite reaction temperature whereby there is formed no more than 10 mole percent of undesired 1,4-(bis(pyridinyloxy))benzene by-product after no more than about 8 hours. Treatment of the undesired by-product in a similar manner alone or by isolation and recycling in the process also results in substantial conversion of said by-product to the desired mono pyridinyloxphenol compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.