Sulphinic acids, hydrolysis

Careful hydrolysis of alkyl or aryl sulphur trihalides, in particular trichlorides, yields either sulphinic acid or sulphinyl halide . The latter is obtained in good yields by reacting the trihalide with the stoichiometric amount of acetic acid (equation 19). 

Metal oxides have been employed to catalyse the acylation of aromatics, leading to dimethylbenzophenones and 4-substituted benzophenones. The reaction of t-butylbenzene with benzoyl chloride in the presence of small amounts of ferric oxide leads to 4-t-butylbenzophenone. Substituted benzophenones have also been obtained by hydrolysis of the dilithium salts (68) formed by the reaction of lithium carboxylates with organolithium derivatives, and benzo-phenone-2 -methoxy-2-sulphinic acids (69) have been successfully prepared by displacement of the sulphone linkage in thioxanthen-9-one 10,10-dioxides (70)... 

Oxidation of thioketones with peroxy-acids gives sulphines, e.g. (38) in one example, the syn- and anti-vsovast could be separated. In contrast, di-t-butyl selenoketone yields di-t-butyl ketone and selenium. The hydrolysis of mono-thioacetylacetone and monothiobenzoylacetone in acidic solution leads to the... 

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