Synthesis and Application of Stereoretentive Ruthenium Catalysts on the Basis of the M7 and the Ru–Benzylidene–Oxazinone Design

A series
of new stereoretentive ruthenium catalysts bearing the
dithiocatecholate ligand was synthesiszed on the basis of the M7 and
Ru–benzylidene–oxazinone design. The activity of the
catalysts was tested in ring-opening cross-metathesis reactions, ring-closing
metathesis reactions, cross-metathesis reactions, and self-metathesis
reactions using Z- and E-configured
starting materials. The desired metathesis products were obtained
with moderate to high yields and with excellent stereoselectivities
(>95%). Substrate-dependent reactivity was found by carrying out
kinetic
studies on internal and terminal olefins.