A failed nucleoside  coupling procedure led to the discovery of one of these reactions which activates the central species with DCC.
Taber's modification is the standard procedure for performing one of these reactions that uses phosphorus pentoxide as an activator. TFAA allows one of these reactions to occur at higher temperatures but forms side products when the targeted groups are not sterically hindered. A failed nucleoside  coupling procedure led to the discovery of one of these reactions which activates the central species with DCC. (*) Pfitzner and Moffatt discovered a reaction of this type which forms difficult to remove urea products. A five-membered sulfur ylide intermediate forms in one of these reactions with an extremely foul smelling byproduct whose active species can be performed by reacting dimethyl sulfide and chlorine. Oxalyl chloride activates DMSO in a reaction of this type which works on acid hydrolyzable compounds which can't handle the Jones reagent. For 10 points, name these sort of reactions which convert alcohols to carbonyls.
Taber's modification is the standard procedure for performing one of these reactions that uses phosphorus pentoxide as an activator.
oxidation [accept more specific oxidations]