title: Palladium-catalyzed oxidative arylating carbocyclization of allenynes: control of selectivity and role of H₂O.
abstract: Highly selective protocols for the carbocyclization/arylation of allenynes using arylboronic acids are reported. Arylated vinylallenes are obtained with the use of BF3⋅Et2O as an additive, whereas addition of water leads to arylated trienes. These conditions provide the respective products with excellent selectivities (generally >97:3) for a range of boronic acids and different allenynes. It has been revealed that water plays a crucial role for the product distribution.
authors: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm (Sweden) http://www.organ.su.se/jeb/index.html.
authors: Teresa
authors: T
authors: Bartholomeyzik
authors: Javier
authors: J
authors: Mazuela
authors: Robert
authors: R
authors: Pendrill
authors: Youqian
authors: Y
authors: Deng
authors: Jan-E
authors: JE
authors: Bäckvall
keywords: allenes; boronic acids; cyclization; oxidation; palladium