Design of chiral bifunctional secondary amine catalysts for asymmetric enamine catalysis

2008 ◽  
pp. 5465 ◽  
Author(s):  
Taichi Kano ◽  
Keiji Maruoka
Keyword(s):  
Secondary Amine ◽  
Enamine Catalysis ◽  
Amine Catalysts

scholarly journals Synthesis of Phenylcyclopropane-Based Secondary Amine Catalysts and Their Applications in Enamine Catalysis

2019 ◽  
Vol 21 (19) ◽  
pp. 8071-8074 ◽  
Author(s):  
Aika Takeshima ◽  
Taichi Kano ◽  
Keiji Maruoka
Keyword(s):  
Secondary Amine ◽  
Enamine Catalysis ◽  
Amine Catalysts

Regio-, Stereo- and Enantioselective α-Addition of Carbonyl Nucleo-philes to Allenamides Catalyzed by a Synergistic Copper/Enamine System

2020 ◽  
Author(s):  
Rémi Blieck ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Catalytic System ◽  
Secondary Amine ◽  
Primary Amine ◽  
Synergistic Catalysis ◽  
Enantioselective Addition ◽  
Amine Catalysts

A dual copper/enamine catalytic system is found to enable an intermolecular enantioselective α-addition of various carbonyl nucleophiles to allenamides. Secondary amine catalysts allowed the highly enantioselective addition of aldehydes, while using primary amine catalysts led to the enantioselective addition of ketoester nucleophiles. The process was found to be highly regio-, stereo- and enantio-selective and represented the first allene hydrofunctionalization using an synergistic catalysis involving copper

Regio-, Stereo- and Enantioselective α-Addition of Carbonyl Nucleophiles to Allenamides Catalyzed by a Synergistic Copper/Enamine System

2020 ◽  
Author(s):  
Rémi Blieck ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Catalytic System ◽  
Secondary Amine ◽  
Primary Amine ◽  
Synergistic Catalysis ◽  
Enantioselective Addition ◽  
Amine Catalysts

A dual copper/enamine catalytic system is found to enable an intermolecular enantioselective α-addition of various carbonyl nucleophiles to allenamides. Secondary amine catalysts allowed the highly enantioselective addition of aldehydes, while using primary amine catalysts led to the enantioselective addition of ketoester nucleophiles. The process was found to be highly regio-, stereo- and enantio-selective and represented the first allene hydrofunctionalization using an synergistic catalysis involving copper

scholarly journals Hierarchically assembled helicates as reaction platform – From stoichiometric Diels-Alder reactions to enamine catalysis

2020 ◽  
Author(s):  
David Van Craen ◽  
Jenny Begall ◽  
Johannes Grosskurth ◽  
Leonard Himmel ◽  
Oliver Linnenberg ◽  
...  
Keyword(s):  
Secondary Amine ◽  
Michael Reaction ◽  
Alder Reaction ◽  
Diels Alder ◽  
Chiral Ligands ◽  
Chiral Induction ◽  
Diels Alder Reaction ◽  
Enamine Catalysis ◽  
Stoichiometric Reaction

The stereoselectivity of a Diels-Alder reaction within the periphery of hierarchically assembled titanium(IV) helicates formed from mixtures of achiral, reactive and chiral, unreactive ligands is investigated in detail. Following the pathway of the chiral induction, the chiral ligands, solvents as well as substituents at the dienophile are carefully varied. Based on the results of the stoichiometric reaction a secondary amine catalyzed nitro-Michael reaction is performed as well which affords reasonable diastereoselectivities.

Regio-, Stereo- and Enantioselective α-Addition of Carbonyl Nucleophiles to Allenamides Catalyzed by a Synergistic Copper/Enamine System

2020 ◽  
Author(s):  
Rémi Blieck ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Catalytic System ◽  
Secondary Amine ◽  
Primary Amine ◽  
Synergistic Catalysis ◽  
Enantioselective Addition ◽  
Amine Catalysts

A dual copper/enamine catalytic system is found to enable an intermolecular enantioselective α-addition of various carbonyl nucleophiles to allenamides. Secondary amine catalysts allowed the highly enantioselective addition of aldehydes, while using primary amine catalysts led to the enantioselective addition of ketoester nucleophiles. The process was found to be highly regio-, stereo- and enantio-selective and represented the first allene hydrofunctionalization using an synergistic catalysis involving copper

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