Synthesis and Characterization of Non-Chelating Ruthenium–Indenylidene Olefin Metathesis Catalysts Derived From Substituted 1,1-Diphenyl-2-Propyn-1-Ols
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Date
2015
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Abstract
We report on the synthesis and characterization of the first generation of modified non-chelating
indenylidene ruthenium catalysts denoted as RuCl2(4-methyl-3-(o-tolyl)-1-indenylidene)(PCy3)2 5a,
RuCl2(3-(p-fluorophenyl)-1-indenylidene)(PCy3)2 5b, RuCl2(3-(2,6-xylyl)-1-indenylidene)(PCy3)2 5c and
RuCl2(3-(1-naphthyl)-1-indenylidene)(PCy3)2 5d. The obtained complexes of 5a–d were characterized by
means of NMR spectroscopy and elemental analysis. Moreover the structures of 5a–d were confirmed
by single-crystal X-ray diffraction and compared with the standard ruthenium indenylidene complex 3
and the chelating benzylidene complex 2. Additionally, the catalytic performances of the obtained
complexes 5a–d were evaluated in various metathesis reactions demonstrating that the ring-closing
metathesis (RCM) and ring-opening metathesis polymerization (ROMP) reactions revealed a similar
catalytic activity in comparison with the reference indenylidene catalyst 3.
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Yu, B., Xie, Y., Hamad, F.B., Leus, K., Lyapkov, A.A., Van Hecke, K. and Verpoort, F., 2015. Synthesis and characterization of non-chelating ruthenium–indenylidene olefin metathesis catalysts derived from substituted 1, 1-diphenyl-2-propyn-1-ols. New Journal of Chemistry, 39(3), pp.1858-1867.