title: Stannylated polynorbornenes as new reagents for a clean Stille reaction.
abstract: New functionalized polynorbornenes have been obtained in good yields by vinylic copolymerization of norbornene with a (norbornenyl)SnBu(2)Cl monomer, catalyzed by [Ni(C(6)F(5))(2)(SbPh(3))(2)]. Subsequent functionalization produces a wide variety of polymers with different --SnBu(2)R groups (R=aryl, vinyl, alkynyl). The polymers can be used as R-transfer reagents in Stille couplings, thereby providing easy workup and separation of the polymeric tin byproducts from the coupling products. Tin contents of around 0.05 wt % are found in the Stille products. The stannylated polymers can be recycled and reused with good efficiency.
authors.affiliation: IU CINQUIMA/Química Inorgánica, Universidad de Valladolid, 47071-Valladolid, Spain.
authors.forename: Nora
authors.initials: N
authors.lastname: Carrera
authors.forename: Enrique
authors.initials: E
authors.lastname: Gutiérrez
authors.forename: Rut
authors.initials: R
authors.lastname: Benavente
authors.forename: M Mar
authors.initials: MM
authors.lastname: Villavieja
authors.forename: Ana C
authors.initials: AC
authors.lastname: Albéniz
authors.forename: Pablo
authors.initials: P
authors.lastname: Espinet