Polystyrene-supported cu(II)-R-Box as recyclable catalyst in asymmetric Friedel–Crafts reaction
作者:V. G. Desyatkin、M. V. Anokhin、V. O. Rodionov、I. P. Beletskaya
DOI:10.1134/s1070428016120010
日期:2016.12
complex of copper(II) trifluoromethanesulfonate with chiral isopropyl bis(oxazoline) ligand (i-Pr-Box) was immobilized on accessible and inexpensive Merrifield resin according to a “click” procedure. The resulting catalyst showed high efficiency and recyclability in the asymmetricFriedel–Craftsalkylation of indole and its derivatives. The catalyst can be recycled five times without appreciable loss in
“Catalysis in a Tea Bag”: Synthesis, Catalytic Performance and Recycling of Dendrimer-Immobilised Bis- and Trisoxazoline Copper Catalysts
作者:Manuela Gaab、Stéphane Bellemin-Laponnaz、Lutz H. Gade
DOI:10.1002/chem.200900504
日期:2009.5.25
Trapped in a “teabag”: Membrane bags, fabricated from a dialysis membrane, have been employed as semipermeable containers for dendrimer‐immobilised oxazoline–copper(II) Lewis acid catalysts. Dipping them into reactant solutions leads to the catalytic conversion of the substrates, which penetrate the membrane as does the product in the reverse direction (see scheme).