Intermediates for making a bezofuran or benzothiophene derivative nitrated in position 5 and uses thereof
US6855842B1 · kind B1 · utility
13Cited by
0References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2000 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Oct 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns novel nitroaromatic compounds of general formula (I′) wherein: R, R′1, R2, Z and n are as defined in claim 1. The invention also concerns a method for preparing nitroaromatic compounds nitrated in position 4. The invention further concerns the use of said compounds for preparing heterocyclic benzofuran or benzothiophene derivatives nitrated in position 5. The invention concerns particularly the preparation of 2-alkyl-5-nitrobezofuran.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.