One reaction of this type makes use of a carbodiiode reagent and forms an alkoxysulfonium ylide intermediate.  
One reaction of this type makes use of a carbodiiode reagent and forms an alkoxysulfonium ylide intermediate.  Other reactions of this type, such as the Parikh-Doering reaction, rely on triethylamine base to activate sulfur containing reagents. Corey and Suggs developed a reddish-orange pyridiunium reagent for use in these reactions, while Dess and Martine developed a periodinane reagent.  In one of these reactions, dimethyl sulfoxide reacts with an alcohol while a similar reaction makes use of (*) chromium trioxide dissolved in sulfuric acid.  Those reactions are named for Swern and Jones.  In general, these reactions convert hydroxyl groups to carbonyls or carboxyls.  For 10 points, name this type of reaction in which electrons are removed from a species, and which are often paired with Reductions.
One reaction of this type makes use of a carbodiiode reagent and forms an alkoxysulfonium ylide intermediate.  
Oxidation Reaction [prompt on "Redox" or "Oxidation Reduction Reaction"]