抄録
Oxidation of S-alkylthiamines and S-carbalkoxythiamines, which are difficult to convert to thiamine by sulfhydryl compounds, was investigated. S-alkylthiamines were oxidized with hydrogen peroxide and perbenzoic aicd in glacial acetic acid to afford the corresponding sulfoxides and the sulfones in accordance with amount of the peroxides, and O-benzoyl-S-carbethoxythiamine, one of S-carbalkoxythiamine derivatives, afforded O-benzoylthiaminic acid. The structures of the sulfoxides and the sulfones were confirmed by elementary analyses, elimination of oxygen and infrared spectra.
