A Wagner-Meerwein rearrangement
is a class of carbocation 1,2-rearrangement reactions
in which a hydrogen
group migrates from one carbon to a neighboring carbon.
Several reviews have been published.
The rearrangement was first discovered in bicyclic terpenes for example the conversion of isoborneol to camphene :
The related Nametkin rearrangement named after Sergey Namyotkin involves the rearrangement of methyl groups in certain terpenes. In some cases the reaction type is also called a retropinacol rearrangement (see Pinacol rearrangement).