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Phospholes
Journal
Comprehensive Heterocyclic Chemistry IV
Date Issued
2021-01-01
Author(s)
Ananthnag, Guddekoppa S.
Balakrishna, Maravanji S.
Abstract
Phospholes are an important class of five-membered unsaturated phosphorus heterocycles. The substantial enhancement of phosphole chemistry in the last few decades is mainly due to their numerous applications in organic electronics, catalysis and other fields. Phospholes, unlike their nitrogen congener, pyrroles, are only weakly aromatic; hence electrophilic substitution reactions on the ring are not facile. Therefore, the functionalization of phospholes is achieved by having the required functionality on the staring materials. The dienic fragment of phospholes also undergo Diels-Alde reaction. The numerous articles highlighting synthesis, properties and applications of phospholes have been reported in the literature since its first inception in 1959. Syntheses of phospholes by various methods and their properties reported since 2009 are reviewed in this chapter.
Subjects