title: Double- and triple-cobalt catalysis in multicomponent reactions.
abstract: The combination of different types of cobalt-catalyzed transformations in one-pot procedures is described. One of the key building blocks, a boron-functionalized isoprene derivative (boroprene), led to the realization of four-component reaction sequences comprising the cobalt-catalyzed Diels-Alder and a 1,4-hydrovinylation reaction. Eventually, a reaction sequence including a cobalt-catalyzed Diels-Alder reaction, a cobalt-catalyzed 1,4-hydrovinylation, an allylboration, and a cobalt-catalyzed Alder-ene reaction led to a five-component one-pot reaction sequence in which five carbon-carbon bonds were formed in excellent regio- and diastereoselectivity to generate complex products in good overall yields.
authors.affiliation: Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Erver
authors.forename: Gerhard
authors.initials: G
authors.lastname: Hilt