Reduction of Sulfoxides and Sulfones to Sulfides
Reduction of Sulfones to Sulfoxides: Experimental Procedure
Reduction of methyl phenyl sulfone to methyl phenyl sulfoxide.
A solution of methyl phenyl sulfone and 4-chlorophenyldiazonium tetrafluoroborate in dry chlorobenzene is heated under reflux for five hours. Subsequently, borohydride is added to the cooled solution and stirring is continued for an additional 20 hours.