Methods for preparing cyclic beta-cyclopentadienyl(dicarbonyl)iron-substituted alpha,beta-unsaturated carbonyl compounds: Precursors to annulated alpha,beta-butenolides and gamma-lactams

摘要

Methods for the synthesis of cyclic [eta(5)-C5H5(CO)(2)Fe]substituted (Z)-enals from cyclic ketones are described. With a single transformation five-membered lactams as well as lactones are accessible from these organometallic reagents. [References: 29]