A number of oxime and benzothiazoline derivatives have been prepared a
nd examined as mediators of sulfur oxidation by hydrogen peroxide as o
xidant in the presence of base. In all cases, sulfoxidation was observ
ed in the presence of the mediators, whereas negligible reaction occur
red in the absence of mediator. Carbodiimides were also examined as me
diators; they proved to be highly reactive, providing predominant oxid
ation directly to sulfone.