title: Allylations of chelated enolates using dienyl substrates.
abstract: Isomerization-free reactions of dienyl carbonates (1-3) with chelated amino acid ester enolates at -78 degrees C provide important information concerning the mechanism of these dienylations. The formation of regioisomeric products can be explained by competing SN2/SN2' reactions, and the product distribution can be influenced by proper choice of the reaction conditions.
authors.affiliation: Universität des Saarlandes, Institut für Organische Chemie, Im Stadtwald, Geb. 23.2, D-66123 Saarbrücken, Germany.
authors.forename: Sankar
authors.initials: S
authors.lastname: Basak
authors.forename: Uli
authors.initials: U
authors.lastname: Kazmaier