Barton-Kellogg-Staudinger reaction

The Barton-Kellogg reaction is a coupling reaction between a diazo compound and a thioketone to give an episulfide. Desulfurization of the episulfide to alkene can be accomplished by phosphine or by copper powder. This reaction has been pioneered by Hermann Staudinger and therefore the reaction also goes by the name Staudinger-type diazo-thioketone coupling. 

Known as Barton-Kellogg olefination, C=C bond formation by the reaction of a thioketone and a ketone through a diazo intermediate has been pioneered by Staudinger s group and further developed by the groups of Barton and Kellogg [22-24]. The thioketone required for the reaction is commonly derived from a... 

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