Efficient access to dibenzothiophene-S-oxides from differently substituted 2-bromo-diarylsulfinyl moieties using ligandless Pd(OAc)2 as the catalyst and KOAc as the base in dimethylacetamide at 130 °C is reported. Various dibenzothiophene-S-oxides were obtained in excellent yields.
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Wesch et al. (2013) studied this question.
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