Process for the preparation of 3-phenoxybenzenes
US4304938A · kind A · utility
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4Claims
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Key dates
| Filing date | Dec 21, 1979 |
| Grant date | Dec 8, 1981 |
| Priority date | — |
| Expiry date | Dec 21, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D317/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
3-Phenoxybenzene derivatives are prepared by a method which comprises the steps of(a) chlorinating benzaldehyde with chlorine gas in the presence of a hydrocarbon and a Lewis acid catalyst to obtain 3-chlorobenzaldehyde; (b) reacting the 3-chlorobenzaldehyde with ethylene glycol to obtain 2-(3-chlorophenyl)-1,3-dioxolane; (c) etherifying said dioxolane with an alkali phenolate to yield the intermediate 2-(3-phenoxyphenyl)-1,3-dioxolane and converting this intermediate to the corresponding aldehyde, cyanohydrin, sulfonic acid salt or oxime derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.