Method for preparing triarylsulfonium salts

Abstract

By reacting an aryl Grignard reagent of the following general formula (1) with thionyl chloride and then reacting the reaction product with a triorganosilyl sulfonate or triorganohalide of the general formula (2): (R.sup.6).sub.3 SiY wherein R.sup.6, which may be the same or different, is a monovalent hydrocarbon group and Y is a substituted or unsubstituted alkylsulfonate or arylsulfonate or halogen atom, there is prepared a triarylsulfonium salt of the following general formula (3). ##STR1## In the formulae, each of R.sup.1 to R.sup.5, which may be the same or different, is a hydrogen atom or a monovalent organic group, especially alkyl, aryl, alkoxy, aryloxy, dialkylamino, dialkylaminoalkyl, alkylthio or arylthio group and X is a bromine or chlorine atom.

Dependencies are inferred from the claim text.