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Catalysts 2017, 7(1), 22; doi:10.3390/catal7010022

Synthesis and Application of Novel Ruthenium Catalysts for High Temperature Alkene Metathesis

Research Focus Area for Chemical Resource Beneficiation, Catalysis and Synthesis Research Group, North-West University, Hoffmann Street, 2531 Potchefstroom, South Africa
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Academic Editors: Albert Demonceau, Ileana Dragutan and Valerian Dragutan
Received: 24 November 2016 / Revised: 30 December 2016 / Accepted: 3 January 2017 / Published: 10 January 2017
(This article belongs to the Special Issue Ruthenium Catalysts)
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Abstract

Four pyridinyl alcohols and the corresponding hemilabile pyridinyl alcoholato ruthenium carbene complexes of the Grubbs second generation-type RuCl(H2IMes)(O^N)(=CHPh), where O^N = 1-(2′-pyridinyl)-1,1-diphenyl methanolato, 1-(2′-pyridinyl)-1-(2′-chlorophenyl),1-phenyl methanolato, 1-(2′-pyridinyl)-1-(4′-chlorophenyl),1-phenyl methanolato and 1-(2′-pyridinyl)-1-(2′-methoxyphenyl),1-phenyl methanolato, are synthesized in very good yields. At high temperatures, the precatalysts showed high stability, selectivity and activity in 1-octene metathesis compared to the Grubbs first and second generation precatalysts. The 2-/4-chloro- and 4-methoxy-substituted pyridinyl alcoholato ligand-containing ruthenium precatalysts showed high performance in the 1-octene metathesis reaction in the range 80–110 °C. The hemilabile 4-methoxy-substituted pyridinyl alcoholato ligand improved the catalyst stability, activity and selectivity for 1-octene metathesis significantly at 110 °C. View Full-Text
Keywords: alkene metathesis; hemilabile ligand; pyridinyl alcohol; ruthenium carbene; Grubbs-type precatalyst; 1-octene alkene metathesis; hemilabile ligand; pyridinyl alcohol; ruthenium carbene; Grubbs-type precatalyst; 1-octene
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MDPI and ACS Style

Tole, T.T.; du Toit, J.I.; van Sittert, C.G.C.E.; Jordaan, J.H.L.; Vosloo, H.C.M. Synthesis and Application of Novel Ruthenium Catalysts for High Temperature Alkene Metathesis. Catalysts 2017, 7, 22.

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