Process for the production of substituted thioxanthones
US6960668B2 · kind B2 · utility
2Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2003 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Oct 13, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D335/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A one-step process for the preparation of a substituted thioxanthone, such as carboxymethoxythioxanthone, in high yields and as a single isomer. The substituted aryl compound is reacted with mercaptobenzoic acid or dithiobisbenzoic acid in the presence of sulphuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.