Dimethyldioxirane efficiently oxidises tricarbonylchromium(0) complexes of alkylthio substituted arenes to tricarbonylchromium(0) complexes of alkylsulfinyl substituted arenes. The diastereoselectivity of oxidation of ortho substituted complexes, which was determined by inter alia X-ray crystal structure analyses of tricarbonyl[η6-1-methoxy-2-(methylsulfinyl)benzene]- chromium(0)20x, [η6-1-(tert-butylsulfinyl)-2-methoxybenzene]tricarbonylchromium(0)23x and tricarbonyl[η6-1-(ethylsulfinyl)-2-methoxybenzene]chromium(0)21y, is dependent on the alkylthio substituent and is reversed when this substituent is changed from methylthio to tert-butylthio.
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Pérez‐Encabo et al. (1994) studied this question.
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