Process for the preparation of chlorination derivatives of pyridine compounds and utilization of bis(trichloromethyl) sulfone in the process
US5696269A · kind A · utility
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5Claims
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Key dates
| Filing date | Feb 3, 1993 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Feb 3, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/61
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a process for the preparation of chlorinated derivatives of pyridine compounds by a chlorination reaction of the corresponding pyridine compounds with molecular chlorine, carried out in the gaseous phase by means of bis(trichloromethyl)sulfone as a free radical initiator. The obtained chlorinated derivatives of pyridine compounds, such as 2,6-dichloropyridine, can be used as chemical intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.