%0 journal article
%@ 0947-6539
%A Schoeps, D., Buhr, K., Dijkstra, M., Ebert, K., Plenio, H.

%D 2009
%J Chemistry - A European Journal
%N 12
%P 2960-2965 
%R doi:10.1002/chem.200802153
%T Batchwise and Continuous Organophilic Nanofiltration of Grubbs-Type Olefin Metathesis Catalysts
%U https://doi.org/10.1002/chem.200802153
12 
%X A mass-tagged N-mesityl imidazolinium salt with four additional -CH2NCy2 substituents was synthesized, leading to a molecular mass of nearly 1100 g mol-1 in the corresponding carbene ligand. This mass-tagged ligand was used to generate the respective Grubbs II and Grubbs-Hoveyda type complexes. The catalytic activity of the latter complex was tested in several olefin metathesis reactions and found to be slightly superior to that of the related N-mesityl based complex. In batchwise solvent resistant nanofiltration experiments the ruthenium complex dissolved in toluene and following a metathesis reactions was efficiently retained (>99.8 %) by a single nanofiltration; the permeate contained less than 4 ppm of Ru. Equally efficient catalyst retention was observed in a membrane reactor utilized for the continuous synthesis of a RCM product.