ChemInform Abstract: In situ Generation of ArCu from CuF<sub>2</sub>Makes Coupling of Bulky Aryl Silanes Feasible and Highly Efficient.

  1. del Pozo, Juan 1
  2. Casares, Juan A. 1
  3. Espinet, Pablo 1
  1. 1 Universidad de Valladolid
    info

    Universidad de Valladolid

    Valladolid, España

    ROR https://ror.org/01fvbaw18

Revista:
ChemInform

ISSN: 0931-7597

Año de publicación: 2016

Volumen: 47

Número: 31

Tipo: Artículo

DOI: 10.1002/CHIN.201631111 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: ChemInform

Resumen

A bimetallic system of Pd/CuF2, catalytic in Pd and stoichiometric in Cu, is efficient and selective for the coupling of fairly hindered aryl silanes with aryl iodides of conventional size. The reaction involves the activation of the silane by Cu(II), followed by disproportionation and transmetalation from the Cu(I)(aryl) to Pd(II), upon which coupling takes place. Cu(III) formed during disproportionation is reduced to Cu(I)(aryl) by excess aryl silane, so that the CuF2 system is fully converted into Cu(I)(aryl) and used in the coupling. No extra source of fluoride is needed. Interesting size selectivity towards coupling is found in competitive reactions of hindered aryl silanes. The isolated products are essentially free from As or Pd.

Referencias bibliográficas

  • delPozo, (2016), Chem. - Eur. J., 22, pp. 4274, 10.1002/chem.201504435