[CI ArSP (OR),]+ prepared from the corresponding sulfinic acids, either directlfl or via the sulfinyl chloride^.^ However, an additional synthetic step is often necessitated by the lack of commercially available sulfinic acids. Alternatively, the sulfinyl chloride may be directly prepared from a more available precursor, the disulfide, by reaction with chlorine6 or sulfuryl chloride'in the presence of acetic acid. When the former reaction is carried out in alcohol ...
