Transformation of organoiron complexes of synthetic and chemical interest

Abstract

Cationic organometallic complexes derived by complexation of vinyl ethers with the dicarbonyl cyclopentadienyliron cation (Fp+) are readily prepared, highly reactive reagents. These substances have been shown to function as vinyl cation equivalents for the vinylation of ketones, and for the synthesis of Ct-methylene-tf-lactones and dihydrofurans. Similar complexation of propiolic esters gives a reactive species, which functions as a β-acrylic ester cation equivalent and yields cyclobutenes, 1,3-dienes and dihydro-α-pyrones with olefins and cinnamic esters with aromatic systems. © 1984 IUPAC