Facile Synthesis of Steroidal Vicinal Hydroxysulfides via the Reaction of Steroidal Epoxides with Thiols in the Presence of an Ionic Liquid

[摘要]：Ring-opening of steroidal 2,3-epoxides with thiols call be carried out effectively in the Bronsted acidic ionic liquid [Hmim](+)[BF4](-) as a recyclable solvent and catalyst. The use of other ionic liquids/molten salts resulted in a decrease in the conversion and/or in reduced selectivity. In [bmin]Br-+(-), a conversion of 2,3-epoxy-17-ones into 2,17- and 3,17-diones was also observed.

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