Recent Development for Formation of Aromatic Compounds via Metallacyclopentadienes as Metal-Containing Heterocycles

Abstract

Metallacyclopentadiene, which is recognized as a metal-containing heterocycle, is an important intermediate for the formation of aromatic derivatives.In this short review, we summarized the recent advance in selective aromatic compounds formation catalyzed or mediated by transition metal complexes via metallacyclopentadienes which are formed by intermolecular coupling of various alkynes including unsymmetrical alkynes, two different alkynes and three different alkynes.Some reaction mechanisms were also reviewed.