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A new copper-catalyzed [3 + 2] cycloaddition: enantioselective coupling of terminal alkynes with azomethine imines to generate five-membered nitrogen heterocycles.
A copper-catalyzed method for the regioselective 1,3-dipolar cycloaddition of azomethine imines to terminal alkynes has been developed. Through the use of a chiral phosphaferrocene-oxazoline ligand,Expand
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A new entry of nucleophiles in rhodium-catalyzed asymmetric 1,4-addition reactions: addition of organozinc reagents for the synthesis of 2-aryl-4-piperidones.
A rhodium-catalyzed asymmetric 1,4-addition reaction has been applied to the synthesis of 2-aryl-4-piperidones. While other conventional nucleophiles fail, organozinc reagents have been successfullyExpand
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C2-symmetric bicyclo[2.2.2]octadienes as chiral ligands: their high performance in rhodium-catalyzed asymmetric arylation of N-tosylarylimines.
Asymmetric synthesis of diarylmethylamines with high enantioselectivity (95-99% ee) was realized by use of a new C2-symmetric diene ligand, (1R,4R)-2,5-diphenylbicyclo[2.2.2]octa-2,5-diene (Ph-bod*),Expand
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Rhodium-catalyzed asymmetric arylation of N-tosyl ketimines.
A rhodium-catalyzed addition of sodium tetraarylborates to N-tosyl ketimines is described. Highly efficient asymmetric catalysis has been achieved by employing a chiral diene ligand, constructingExpand
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Copper-Catalyzed Hydroboration of Carbon Dioxide
A copper/N-heterocyclic carbene catalyzed hydroboration of carbon dioxide has been developed to give a formic acid derivative selectively under mild conditions. Investigations directed towardExpand
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Rhodium-catalyzed asymmetric [5+2] cycloaddition of alkyne-vinylcyclopropanes.
Transition-metal-catalyzed [5+2] cycloaddition of vinylcyclopropanes with carbon carbon unsaturated bonds is an efficient way of constructing seven-membered carbocycles. Several transition metalsExpand
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Asymmetric synthesis of 2-aryl-2,3-dihydro-4-quinolones by rhodium-catalyzed 1,4-addition of arylzinc reagents in the presence of chlorotrimethylsilane.
[reaction: see text] The first catalytic asymmetric synthesis of 2-aryl-2,3-dihydro-4-quinolones has been developed by way of a rhodium-catalyzed 1,4-addition of arylzinc reagents to 4-quinolones.Expand
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Chiral Diene Ligands for Asymmetric Catalysis
As conceptually new chiral ligands, we have been developing enantiomerically pure C2-symmetric chiral dienes, whose basic diene skeleton is bicyclo[2.2.1]hepta-2,5-diene (nbd*),Expand
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