Preparation of monohalohydroquinone monocarboxylates/dicarboxylates
US4727182A · kind A · utility
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1References
34Claims
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Key dates
| Filing date | Jun 25, 1985 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Jun 25, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/287
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Monohalohydroquinone monocarboxylates are selectively prepared by halogenating a hydroquinone monocarboxylate, or admixture thereof with a hydroquinine dicarboxylate and a minor amount of hydroquinone, with a chlorine, bromine or sulfuryl halide halogenating agent; such monocarboxylates are facilely converted into the corresponding dicarboxylates by acylation. Both the monocarboxylates, e.g., monochlorohydroquinone monoacetate, and dicarboxylates, e.g., monochlorohydroquinone diacetate, are useful organic intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.