4,4'-Dichloro- and 4-chloro-4'-hydroxy-2,2'-bis(trifluoromethyl)diphenyl sulphoxides and sulphones

Article abstract of DOI:10.1016/0022-1139(94)03080-4

4,4'-Dichloro-2,2'-bis(trifluoromethyl)diphenyl sulphoxide can be prepared from 2-bromo-4-chlorobenzotrifluoride and converted to the 2,2'-bis(trifluoromethyl)diphenyl sulphone, although the oxidation is remarkably difficult owing to the steric protection