Selective alkylation of 2,5-xylenol in the presence of 2,4-xylenol
US4292450A · kind A · utility
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Key dates
| Filing date | Jun 12, 1980 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jun 12, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A mixture of 2,4-/2,5-xylenol can be alkylated with a suitable alkylating agent over a strongly acidic divinylbenzene-styrene copolymer to afford a greater amount of 4-t-alkyl-2,5-xylenol than 6-t-alkyl-2,4-xylenol provided the alkylation is carried out at a suitably low temperature of 60.degree. C. or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.