Process for preparing aromatic or heteroaromatic sulfonyl halides
US5811571A · kind A · utility
Inventors
Key dates
| Filing date | Dec 13, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Dec 13, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D263/46
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to a process for preparing an aromatic or heteroaromatic sulfonyl halide represented by the formula (3), the process comprising halogenating an aromatic or heteroaromatic methyl sulfide represented by the formula (1) or an aromatic or heteroaromatic methyl sulfoxide represented by the formula (2) with a halogenating agent in the presence of water EQU Ar.paren open-st.SCH.sub.3-m X.sub.m).sub.n (1) EQU Ar.paren open-st.SOCH.sub.3-m X.sub.m).sub.n (2) EQU Ar.paren open-st.SO.sub.2 Y).sub.n (3) wherein Ar is an aromatic ring or a heteroaromatic ring which is unsubstituted or which has an optional substituent or substituents, X and Y are halogen atoms, m is an integer of 0 to 3 and n is 1 or 2. According to the present invention, aromatic or heteroaromatic sulfonyl halides can be produced industrially cheaply and easily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.