The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 6224-63-1, Name is Tri-m-tolylphosphine, SMILES is CC1=CC(P(C2=CC=CC(C)=C2)C3=CC=CC(C)=C3)=CC=C1, in an article , author is Gok, Halil Zeki, once mentioned of 6224-63-1, Category: chiral-phosphine-ligands.
Synthesis of C-2-Symmetric Bisphosphines and Their Application in Enantioselective Transition Metal Catalysis
C-2-symmetric bisphosphine ligands (with a dioxolane backbone) have been synthesized by using corresponding chiral bromosubstituted hydrobenzoin derivatives in two steps with moderate yields. The last step for desired bisphosphines defined the electronic and steric properties of the chelating atoms by the treatment of aryl or alkyl substituted chlorophosphine compounds in the presence of a base. These synthesized ligands have been evaluated in different catalytic reactions. The first application has been the palladiumcatalyzed enantioselective allylic alkylation which is regarded as a remarkable reaction for forming enantioselective carbon-carbon bond (up to 63 % ee and 98 % chemical yield). The ruthenium-catalyzed enantioselective transfer hydrogenation reaction has been the second application for the evaluating of the catalysts (up to > 99 % conversion with no enantioselectivity).
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Reference:
Phosphine ligand,
,Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate