title: Bis-mixed-carbene ruthenium-thiolate-alkylidene complexes: synthesis and olefin metathesis activity.
abstract: A series of bis-carbene Ru-hydride species, including (IMes)(Im(OMe)2)(PPh3)RuHCl (1) and (SIMes)(Me2Im(OMe)2)(PPh3)RuHCl (2) were prepared and subsequently shown to react with aryl-vinyl-sulfides to give the bis-carbene-alkylidene complexes: Im(OMe)2(SIMes)RuCl(SR)(=CHCH3) (R = p-FC6H4 (3), p-(NO2)C6H4 (4)), Im(OMe)2(IMes)RuCl(=CHCH3)(SPh) (5), Me2Im(OMe)2(SIMes)RuCl(=CHCH3)(SPh) (6), Im(OMe)2(SIMes)(F5C6S)RuCl(=CHR) (R = C4H9 (9), C5H11 (10)). The activity of these species in the standard Grubbs' tests for ring-opening metathesis polymerization, ring-closing and cross-metathesis are reported. Although these thiolate derivatives are shown to exhibit modest metathesis activities, the reactivity is enhanced in the presence of BCl3.
authors.affiliation: Department of Chemistry, University of Toronto, 80 St. George St Toronto, Ontario, M5S3H6, Canada. dstephan@chem.utoronto.ca.
authors.forename: Fatme
authors.initials: F
authors.lastname: Dahcheh
authors.forename: Douglas W
authors.initials: DW
authors.lastname: Stephan
mesh_terms: D000085:Acetates / Q000737:chemistry; D000179:Acrylates / Q000737:chemistry; D000466:Alkadienes / Q000737:chemistry; D000475:Alkenes / Q000737:chemistry*; D008314:Malonates / Q000737:chemistry; D008697:Methane / Q000031:analogs & derivatives / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry
chemical_list: D000085:Acetates; D000179:Acrylates; D000466:Alkadienes; D000475:Alkenes; D008314:Malonates; D009942:Organometallic Compounds; D013440:Sulfides; C429244:diethyl diallylmalonate; C439868:1,5-cyclooctadiene; C030011:carbene; D012428:Ruthenium; D008697:Methane; C035956:methyl acrylate