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Deoxygenation of sulfoxides to thioethers and reductive coupling of sulfonyl chlorides, sodium sulfinates and thiosulfonates to their corresponding disulfides were carried out by a heterogeneous phosphine reagent, Silphos [PCl3-n(SiO2)n] and molecular I2 in dry refluxing MeCN in high yields.
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Iranpoor et al. (2005) studied this question.
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