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Ring‐Closure Metathesis in Supercritical Carbon Dioxide as Sole Solvent with Use of Covalently Immobilized Ruthenium Catalysts
Author(s) -
Michalek Florian,
Mädge Daniel,
Rühe Jürgen,
Bannwarth Willi
Publication year - 2006
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.200500738
Subject(s) - chemistry , ruthenium , catalysis , covalent bond , metathesis , supercritical carbon dioxide , supercritical fluid , leaching (pedology) , organic chemistry , solvent , heterogeneous catalysis , salt metathesis reaction , combinatorial chemistry , environmental science , soil science , polymerization , soil water , polymer
We describe RCM reactions in the presence of a Hoveyda‐type catalyst covalently immobilized on different support materials. The performance of the catalyst was highly dependent on the nature of the support, and in some cases high levels of conversion were obtained, allowing for repetitive cycles. In addition, remarkably low levels of leaching of ruthenium into the product (20 ppm) were observed. This environmentally benign process has potential for continuous applications.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)