title: Metal-catalyzed transformations of propargylic alcohols into alpha,beta-unsaturated carbonyl compounds: from the Meyer-Schuster and Rupe rearrangements to redox isomerizations.
abstract: The catalytic isomerization of propargylic alcohols promoted by transition-metals represents a straightforward and appealing route to synthetically useful alpha,beta-unsaturated carbonyl compounds. Three different reaction pathways are known for these atom-economical transformations: (i) the so-called Meyer-Schuster and Rupe rearrangements, in which a formal 1,3- or 1,2-shift of the hydroxyl group takes place, and (ii) the redox-type isomerization, which involves a simultaneous oxidation of the alcohol unit and reduction of the C[triple bond]C bond. In this Perspective article an overview of the different metal catalysts presently available to promote these isomerization reactions, their mechanisms of action as well as relevant synthetic applications, is provided.
authors.affiliation: Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica Enrique Moles (Unidad Asociada al CSIC), Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain. vcm@uniovi.es
authors.forename: Victorio
authors.initials: V
authors.lastname: Cadierno
authors.forename: Pascale
authors.initials: P
authors.lastname: Crochet
authors.forename: Sergio E
authors.initials: SE
authors.lastname: García-Garrido
authors.forename: José
authors.initials: J
authors.lastname: Gimeno