A new class of precursors for water-soluble unsaturated carbenes was synthesized by reaction of [Cp*RuCl(PMe3)2] with a terminal alkyne and a propargyl alcohol, each bearing a polyhydroxylated lateral chain derived from d-xylose. In the reaction with the terminal glycoynitol, the presence of a pair of noninterconverting ?-alkyne intermediates of [Cp*Ru(PMe3)2]+ species was observed for the first time and the kinetics of isomerization to the same vinylidene species measured by NMR experiments.
Ruthenium(II) π-Alkyne and Vinylidene Complexes Derived from Glycoynitols: New Precursors for Water-Soluble Unsaturated Carbenes
Reginato Gianna
;Gonsalvi Luca;Peruzzini Maurizio
2004
Abstract
A new class of precursors for water-soluble unsaturated carbenes was synthesized by reaction of [Cp*RuCl(PMe3)2] with a terminal alkyne and a propargyl alcohol, each bearing a polyhydroxylated lateral chain derived from d-xylose. In the reaction with the terminal glycoynitol, the presence of a pair of noninterconverting ?-alkyne intermediates of [Cp*Ru(PMe3)2]+ species was observed for the first time and the kinetics of isomerization to the same vinylidene species measured by NMR experiments.File in questo prodotto:
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