S.E.Garcia-Garrido, J. Francos, V. Cadierno, J.-M. Basset, V. Polshettiwar
ChemSusChem, vol.4, issue 1, pp. 104-111, (2011)
A ruthenium-arene-PTA (RAPTA) complex has been supported for the first
time on an inorganic solid, that is, silica-coated ferrite
nanoparticles. The resulting magnetic material proved to be a general,
very efficient and easily reusable catalyst for three synthetically
useful organic transformations; selective nitrile hydration, redox
isomerization of allylic alcohols, and heteroannulation of (Z)-enynols.
The use of low metal concentration, environmentally friendly water as a
reaction medium, with no use at all of organic solvent during or after
the reactions, and microwaves as an alternative energy source renders
the synthetic processes reported herein "truly" green and sustainable.