Regio- and stereoselective synthesis for a novel class of organoaluminium compounds - substituted aluminacyclopentanes and aluminacyclopentenes assisted by zirconium catalysts

Article abstract of DOI:10.1016/0022-328X(94)88022-0

A novel regio- and stereoselective method has been developed for the catalytic cyclometallation of olefins and acetylenes with alkylalanes in the presence of Cp2ZrCl2, to give in one stage high yields of 3-substituted aluminacyclopentanes and aluminacyclopentenes.Applications of these reactions to a wide range of linear and cyclic olefins and to those containing functional substituents have been studied.The transformation of the aluminacyclopentanes thus produced, into five-membered heterocycles, mono- and di-substituted cyclobutanes and cyclopropanes, has been demonstrated.Key words: Alumina; Cyclopentane; Zirconium; Catalysis