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In Situ Activation of a Latent Ruthenium–Carbene Complex in Ionic Liquid and Its Application in Ring‐Closing Metathesis
Author(s) -
Kim Ju Hyun,
Park Boyoung Y.,
Chen ShuWei,
Lee Sanggi
Publication year - 2009
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.200801214
Subject(s) - chemistry , halide , ionic liquid , ring closing metathesis , carbene , metathesis , ruthenium , in situ , ring (chemistry) , catalysis , medicinal chemistry , organic chemistry , polymer chemistry , polymer , polymerization
Catalytically inactive, latent Ru–carboxylate complex 2 , which was recently serendipitously isolated, can be activated in situ efficiently in ionic liquids (ILs) with the aid of imidazolium halides or tetrabutylammonium halides. The activity of the in situ activated catalyst was largely dependent on IL anions, imidazolium halides, and terabutylammonium halides. Under the optimal condition of 1.0 mol‐% of [bmim][Br] in CH 2 Cl 2 /[bmim][SbF 6 ] (1:1), latent Ru complex 2 was activated in situ to catalyze the ring‐closing metathesis of various dienes with conversions of up to >99 %. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)