Journal
CATALYSIS COMMUNICATIONS
Volume 8, Issue 3, Pages 442-446Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2006.07.016
Keywords
alkynes; hydrogenation; ruthenium; immobilization; flow reactor
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Water-soluble ruthenium(II) and rhodium(I) complexes containing monosulfonated triphenylphosphine (mtppms) ligands were immobilized on commercially available anion-exchangers. The resulting solid catalysts were suitable for use in a microfluidics-based flow reactor (H-Cube (TM)) of high throughput capability. With the heterogenized [{RUCl2(mtppms)(2)}(2)] disubstituted alkynes were hydrogenated to cis-alkenes with up to 85% selectivity, while the use of the immobilized [RhCl(mtppms)(3)] yielded 1,2-diphenylethane as the major product. The ruthenium catalyst also reduced trans-cinnamaldehyde to 3-phenylpropanal selectively and catalyzed the isomerization of 1-octen-3-ol to octan-3-one. This simple and versatile method of the immobilization of water-soluble complexes yields active and durable molecularly dispersed yet solid catalysts. (c) 2006 Elsevier B.V. All rights reserved.
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