Process for preparing fluorescein quinoid form
US10745373B2 · kind B2 · utility
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15Claims
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Assignee
Inventors
Key dates
| Filing date | Jul 31, 2019 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Jul 31, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparing fluorescein quinoid form of Formula (I): Furthermore, the present invention relates to a new solid fluorescein form and a process for the preparation thereof. The present invention also relates to the use of said new solid fluorescein form in the synthesis of fluorescein quinoid form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.