ChemCatChem · 2013 · 17 citations · 56 references
Natural SciencesChemistryCatalysisOrganic ChemistryOrganometallic ChemistryCatalyst PreparationCatalyst SynthesisCatalytic MechanismsHeterocyclic ChemistryHeterocyclic CompoundsOrganometallic SynthesisAlkyne ActivationAlkyne FunctionalizationAlkyne Platinum ComplexesBicyclononyne ChemistryEnantioselective CatalysisEnantioselective SynthesisPhosphoramidite Chemistry
Abstract The enantioselective cycloisomerization of 3‐hydroxylated 1,5‐enynes into bicyclo[3.1.0]hexanones was investigated by using cyclometalated NHC‐platinum phosphoramidite complexes as pre‐catalysts. Several new complexes were prepared. They generate cationic, electrophilic Pt II species that efficiently promote the cycloisomerization process. Enantiomeric excesses up to 81 % were obtained in the reactions of enynes with aryl‐substituted alkyne functions (8 examples, 70–81 % ee ).
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A short history of<i>SHELX</i>
George M. Sheldrick · Acta Crystallographica Section A Foundations of Crystallography · 2007 · 87.4K citations · Full text