4,4'-Dichloro- and 4-chloro-4'-hydroxy-2,2'-bis(trifluoromethyl)diphenyl sulphoxides and sulphones
作者:James H. Clark、James E. Denness、Andrew J. Wynd
DOI:10.1016/0022-1139(94)03080-4
日期:1994.12
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 of the lone pair on sulphur by the two CF3 groups. Both the sulphoxide and the sulphone can be converted into the 4-chloro-4'-hydroxy single monomers
从2-溴-4-氯苯并三氟可制得4,4'-二氯-2,2'-双(三氟甲基)二苯基亚砜,将其转化为2,2'-双(三氟甲基)二苯砜,尽管氧化反应明显。由于两个CF 3基团对硫上的孤对具有立体保护作用,因此很难实现。亚砜和砜都可以转化为4-氯-4'-羟基单单体。