Process for the preparation of 4-phenyldibenzothiophene
US9951037B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Dec 1, 2015 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Dec 1, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a novel method for the preparation of 4-phenyldibenzo[b,d]thiophene which can be conducted in one pot up to the thiophene ring formation. The synthesis is based upon dihalobenzenes and phenyllithium, which are readily obtainable, and can give higher yields (based upon either reactant) than the yields current methods, which use a synthetic pathway based upon dibenzo[b,d]thiophene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.