Process for ring-chlorinating toluene
US4647709A · kind A · utility
12Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Aug 29, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the ring chlorination of toluene, a particularly high proportion of p-chlorotoluene is obtained by using in addition to the customary Lewis acid catalysts as cocatalyst a chlorination product of 2,8-dimethylphenoxathiin which comprises in the main 1,3,7,9-tetrachloro-2,8-dimethylphenoxathiin of the formula ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.