Anion rearrangements: a case of a non-degenerate all-carbon [3,2]-sigmatropic process
Abstract
The first example of an all-carbon anionic [3,2]-sigmatropic rearrangement has been observed in the conversion of 9-(3-methylbut-2-enyl)-9-(lithiomethyl)-fluorene into 9-(2,2-dimethylbut-3-enyl)-9-lithiofluorene, the reaction being accompanied by a temperature-dependent dissociation–recombination process.