It is thought to proceed through a betaine intermediate, which is required for one modification of this reaction named for Schlosser.
Lawesson's reagent is formed by a ring-closing mechanism similar to one seen in this reaction, and it yields products that are also obtained via a reaction named for Julia and Lythgoe. Similar reagents in it are used in the Still-Gennari reaction, the Arbuzov reaction, and the Horner-Wadsworth-Emmons reaction. It is thought to proceed through a betaine intermediate, which is required for one modification of this reaction named for Schlosser. The Horner modification to this reaction produces (E)-alkenes, though normally the formation of (E)- or (Z)-alkenes is determined the stability of its ylide intermediate. For ten points, name this reaction that uses triphenyl phosphine to generate alkenes from carbonyl compounds.
Lawesson's reagent is formed by a ring-closing mechanism similar to one seen in this reaction, and it yields products that are also obtained via a reaction named for Julia and Lythgoe.
{Wittig} reaction