Aerobic oxidation of thiols to disulfides catalyzed by diaryl tellurides under photosensitized conditions |
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Authors: | Oba Makoto Tanaka Kazuhito Nishiyama Kozaburo Ando Wataru |
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Institution: | Department of Materials Chemistry, Tokai University, 317 Nishino, Numazu, Shizuoka 410-0395, Japan. moba@tokai-u.jp |
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Abstract: | Aerobic oxidation of thiols is efficiently catalyzed by diaryl tellurides such as bis(4-methoxyphenyl) telluride under photosensitized conditions to give the corresponding disulfides in good to excellent yields. In this catalytic system, the tellurone oligomer, produced by the reaction of a telluride with singlet oxygen, is assumed to be the active species and is capable of oxidizing 4 equiv of a thiol. |
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