Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 183-191 |
| Seitenumfang | 9 |
| Fachzeitschrift | Australian Journal of Chemistry |
| Jahrgang | 66 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 9 Jan. 2013 |
Abstract
Two Hoveyda type ruthenium metathesis precatalysts, Umicore M51 and Umicore M71 SIMES, were immobilized on commercial silica in a simple and fast procedure through direct interaction with the support surface. These precatalysts exhibited good activity in ring-closing, cross, and enyne metathesis reactions and were stable in terms of reusability to be used for consecutive runs under both batch and flow conditions. In non-polar media, the catalytic activity of the precatalysts is truly based on a heterogeneous species, and the contamination of the products with ruthenium was very low with respect to starting catalyst (0.003-0.01%; 0.13-0.44ppm). If necessary, such as in solvents like toluene, the ruthenium content can easily be reduced to levels below 0.5ppm by treatment of the crude metathesis products with the commercial scavenger QuadraSil AP or by use of an additional QuadraSil AP scavenger cartridge under flow conditions.
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in: Australian Journal of Chemistry, Jahrgang 66, Nr. 2, 09.01.2013, S. 183-191.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Silica immobilized Hoveyda type pre-catalysts
T2 - Convenient and reusable heterogeneous catalysts for batch and flow olefin metathesis
AU - Solodenko, Wladimir
AU - Doppiu, Angelino
AU - Frankfurter, René
AU - Vogt, Carla
AU - Kirschning, Andreas
PY - 2013/1/9
Y1 - 2013/1/9
N2 - Two Hoveyda type ruthenium metathesis precatalysts, Umicore M51 and Umicore M71 SIMES, were immobilized on commercial silica in a simple and fast procedure through direct interaction with the support surface. These precatalysts exhibited good activity in ring-closing, cross, and enyne metathesis reactions and were stable in terms of reusability to be used for consecutive runs under both batch and flow conditions. In non-polar media, the catalytic activity of the precatalysts is truly based on a heterogeneous species, and the contamination of the products with ruthenium was very low with respect to starting catalyst (0.003-0.01%; 0.13-0.44ppm). If necessary, such as in solvents like toluene, the ruthenium content can easily be reduced to levels below 0.5ppm by treatment of the crude metathesis products with the commercial scavenger QuadraSil AP or by use of an additional QuadraSil AP scavenger cartridge under flow conditions.
AB - Two Hoveyda type ruthenium metathesis precatalysts, Umicore M51 and Umicore M71 SIMES, were immobilized on commercial silica in a simple and fast procedure through direct interaction with the support surface. These precatalysts exhibited good activity in ring-closing, cross, and enyne metathesis reactions and were stable in terms of reusability to be used for consecutive runs under both batch and flow conditions. In non-polar media, the catalytic activity of the precatalysts is truly based on a heterogeneous species, and the contamination of the products with ruthenium was very low with respect to starting catalyst (0.003-0.01%; 0.13-0.44ppm). If necessary, such as in solvents like toluene, the ruthenium content can easily be reduced to levels below 0.5ppm by treatment of the crude metathesis products with the commercial scavenger QuadraSil AP or by use of an additional QuadraSil AP scavenger cartridge under flow conditions.
UR - http://www.scopus.com/inward/record.url?scp=84873890827&partnerID=8YFLogxK
U2 - 10.1071/CH12434
DO - 10.1071/CH12434
M3 - Article
AN - SCOPUS:84873890827
VL - 66
SP - 183
EP - 191
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 2
ER -