Process for the preparation of 2-hydroxyarylaldehydes under reduced pressure
US5763675A · kind A · utility
5Cited by
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24Claims
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Key dates
| Filing date | Jan 5, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jan 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/68
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the preparation of a 2-hydroxyarylaldehyde which comprises reacting a magnesium bis-hydrocarbyloxide, derived at least in part from a hydroxyaromatic compound having at least one free position ortho to the hydroxyl group, with formaldehyde or a formaldehyde-liberating compound under substantially anhydrous conditions at a pressure of from 50 to 700 mm Hg absolute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.