title: Gold-catalyzed tandem hydroamination/formal aza-Diels-Alder reaction of homopropargyl amino esters: a combined computational and experimental mechanistic study.
abstract: A tandem gold-catalyzed hydroamination/formal aza-Diels-Alder reaction is described. This process, which employs quaternary homopropargyl amino ester substrates, leads to the formation of an intrincate tetracyclic framework and involves the generation of four bonds and five stereocenters in a highly diastereoselective manner. Theoretical calculations have allowed us to propose a suitable mechanistic rationalization for the tandem protocol. Additionally, by studying the influence of the ligands on the rate of the gold-catalyzed reactions, it was possible to establish optimum conditions in which to perform the process with a variety of substituents on the amino ester substrates. Notably, the asymmetric version of the tandem reaction was also evaluated.
authors.affiliation: Departamento de Química Orgánica, Universidad de Valencia, 46100 Burjassot (Spain).
authors.forename: Javier
authors.initials: J
authors.lastname: Miró
authors.forename: María
authors.initials: M
authors.lastname: Sánchez-Roselló
authors.forename: Javier
authors.initials: J
authors.lastname: González
authors.forename: Carlos
authors.initials: C
authors.lastname: del Pozo
authors.forename: Santos
authors.initials: S
authors.lastname: Fustero
keywords: aza-Diels-Alder; density functional calculations; gold; hydroamination; tandem reaction