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Beilstein J. Org. Chem. 2019, 15, 194–209, doi:10.3762/bjoc.15.19
Graphical Abstract
Figure 1: Structures of Grubbs 1 (1) and 2 (2) precatalysts.
Scheme 1: Design concepts for ruthenium alkylidene precatalysts [3].
Figure 2: Structures of Grubbs 1-type (3) and 2-type (4) pyridinyl-alcoholato precatalysts.
Figure 3: Structures of Grubbs 2-type (5) pyridinyl-alcoholato precatalysts.
Figure 4: Structures of pyridinyl-substituted Grubbs 2-type pyridinyl-alcoholato precatalysts.
Figure 5: The influence of the reaction temperature on the (a) conversion of 1-octene, (b) formation of PMPs ...
Figure 6: The influence of the reaction temperature on the (a) conversion of 1-octene, (b) formation of PMPs ...
Figure 7: The influence of the reaction temperature on the (a) conversion of 1-octene, (b) formation of PMPs ...
Figure 8: The influence of the reaction temperature on the (a) conversion of 1-octene, (b) formation of PMPs ...
Figure 9: Geometry-optimised structures of precatalyst 9, 6 and 8.
Figure 10: An illustration of the envisaged methoxy oxygen lone pair-aromatic π-electron interaction.
Figure 11: Influence of precatalysts 6–9 and 5d on the (a) conversion of 1-octene and (b) ln([n%1-octene]) ver...
Figure 12: 1H NMR spectra of the carbene-Hα region at different time intervals of the 1-octene/7 reaction mixt...
Figure 13: 1H NMR spectra of the Hα region of the pyridine ring of the 1-octene/7 reaction mixture in toluene-d...
Scheme 2: Synthesis of pyridinyl-alcohol ligands and Grubbs 2-type pyridinyl-alcoholato complexes.