Process for the preparation of glycidyl compounds
US4722983A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of glycidyl compounds by reacting a compound containing at least one phenolic group with at least the equivalent amount, based on the phenolic group, of a halohydrin in a substantially anhydrous, aprotonic solvent in the presence of a solid, substantially anhydrous catalyst, is described, which process comprises carrying out the reaction at a temperature in the range from 40.degree. to 80.degree. C. in the presence of an alkali metal carbonate, an aprotonic dipolar solvent with a static relative dielectric constant of more than 25 (at 25.degree. C.) and a permanent electric dipole moment of more than 2.5 D being used, an additional feature of said solvent being that the transition energy of the solvatochromic absorption band of the dissolved N-(3,5-diphenyl-4-hydroxyphenyl)-2,4,6-triphenylpyridinium perchlorate is in the range from 168 to 197.4 kJ/mole (at 25.degree. C.), or which process comprises carrying out the reaction at a temperature in the range from 60.degree. to 80.degree. C. in the presence of an alkali metal hydroxide and a phase transfer catalyst chosen from the group consisting of ammonium and/or phosphonium compounds, the water of reacti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.