Barton–Kellogg_reaction
The Barton–Kellogg reaction is a coupling reaction between a diazo compound and a thioketone, giving an alkene by way of an episulfide intermediate. The Barton–Kellogg reaction is also known as Barton–Kellogg olefination and Barton olefin synthesis.
This reaction was pioneered by Hermann Staudinger, and also goes by the name Staudinger type diazo-thioketone coupling.