Thiophene synthesis
US5723629A · kind A · utility
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20Claims
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Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapour phase, in the presence of a jarosite-type catalyst, having the composition EQU M(Fe.sub.0.8-1 Cr.sub.0.2-0)(OH).sub.6 X.sub.n wherein M is NH.sub.4 or an alkali metal; and X.sub.n represents one or more suitable anions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.