Synthesis of dihalobenzene disulfone compounds
US5081306A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Jun 15, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C315/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing dihalobenzene disulfone compounds, comprising reacting, in the presence of aluminum trichloride PA1 a halobenzene sulfonyl halide of the formula ##STR1## wherein X and Y are halogen which may be the same or different, with a compound of the formula EQU H - Q - H PA1 wherein Q is a divalent radical containing benzenoid unsaturation and the hydrogens are replaceable under electrophilic Friedel-Crafts reaction conditions, PA1 in a solvent consisting essentially of about 1 to about 25 volume %, based on the solvent volume, of nitromethane and, correspondingly, about 99 to about 75 volume %, of a polar aliphatic halohydrocarbon, the total solvent volume employed being sufficient to provide between about 0.5 and about 1.5 moles of nitromethane per mole of aluminum trichloride, PA1 thereby producing a dihalobenzene disulfone compound of the formula ##STR2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.