Synthesis of Disulfanes from Organic Thiocyanates Mediated by Sodium in Silica Gel
摘要:
We report an efficient procedure for the synthesis of symmetrical disulfanes from organic thiocyanates in the presence of sodium in silica gel at room temperature. By avoiding the use of foul-smelling thiols, the present protocol provides an attractive alternative to existing methods for the preparation of symmetrical disulfanes.
available aryl and alkyl thiocyanates were converted into the corresponding (benzenesulfonyl)difluoromethyl thioethers via the direct nucleophilic substitution of ((difluoromethyl)-sulfonyl)benzene under transition metal free conditions. Combined with various thiocyanation methods, this reaction can allow late-stage (benzenesulfonyl)difluoromethylthiolation of alkyl halides and aryldiazoniumsalts.
In this paper we report an efficient and mild procedure for the conversion of organic thiocyanates to thiols in the presence of phosphoruspentasulfide (P2S5) in refluxing toluene. The method avoids the use of expensive and hazardous transition metals and harsh reducing agents, as required by reported methods, and provides an attractive alternative to the existing methods for the conversion of organic