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Olefin Metathesis in the Ionic Liquid 1‐Butyl‐3‐methylimidazolium Hexafluorophosphate Using a Recyclable Ru Catalyst: Remarkable Effect of a Designer Ionic Tag
Author(s) -
Yao Qingwei,
Zhang Yiliang
Publication year - 2003
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200351222
Subject(s) - ionic liquid , hexafluorophosphate , catalysis , metathesis , ruthenium , chemistry , sulfonyl , carbene , enyne metathesis , diene , ionic bonding , solvent , toluene , salt metathesis reaction , organic chemistry , combinatorial chemistry , ion , polymerization , polymer , alkyl , natural rubber
Designer labels : Ruthenium carbene complex 1 bearing an ionic tag was shown to be a highly reactive catalyst for the ring‐closing metathesis of various diene and enyne substrates in minimally ionic solvent systems (see scheme; Bmim=1‐butyl‐3‐methylimidazolium, Ts=toluene‐4‐sulfonyl). The catalyst can be repeatedly recycled and reused (up to at least 10 cycles) without significant loss of its activity, whereas other catalysts tested exhibited a dramatic diminishment in their activity upon recovery from the ionic layer.