541507-33-9Relevant academic research and scientific papers
Ruthenium-catalyzed olefin metathesis double-bond isomerization sequence
Schmidt, Bernd
, p. 7672 - 7687 (2007/10/03)
A novel ruthenium-catalyzed tandem ring-closing metathesis (RCM) double-bond isomerization reaction is described in this paper. The utility of this method for the efficient syntheses of five-, six-, and seven-membered cyclic enol ethers is demonstrated. It relies on the conversion of a metathesis-active ruthenium carbene species to an isomerization-active ruthenium-hydride species in situ. This conversion is achieved by using various additives. Scope and limitations of the different protocols are discussed, and some mechanistic considerations based on 31P and 1H NMR spectroscopic studies are presented.
In situ conversion of a Ru metathesis catalyst to an isomerization catalyst
Schmidt, Bernd
, p. 742 - 743 (2007/10/03)
Addition of alcohols and substoichiometric amounts of a base to a metathesis reaction induces conversion of the metathesis-active carbene catalyst to an isomerization-active hydride species.
An olefin metathesis/double bond isomerization sequence catalyzed by an in situ generated ruthenium hydride species
Schmidt, Bernd
, p. 816 - 819 (2007/10/03)
The direct conversion of allyl ethers to cyclic enol ethers using an olefin metathesis/double bond migration sequence is described. Ruthenium carbene complexes were activated to catalyze the double bond migration step by addition of hydride sources, such
Dihydropyran derivatives and crop protection agents containing them
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, (2008/06/13)
Crop protection agents contain dihydropyrans of the formula STR1 wherein the variable substituents are defined in the specification.
