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Enantioselective Aza-Henry Reaction (enantioselective aza-henry + reaction)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Enantioselective Aza-Henry Reaction with Acyclic Guanidine-Thiourea Bifunctional Organocatalyst

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 3 2009
Keisuke Takada
Abstract A highly enantioselective aza-Henry reaction of imines with nitromethane was achieved with a reactive guanidine-thiourea bifunctional organocatalyst affording ,-nitroamines with high enantioselectivity (up to 96% ee). The diastereo- and enantioselective version of this reaction with nitroalkanes also proceeded selectively (up to 99:1 dr with 99% ee). [source]

ChemInform Abstract: Enantioselective Aza-Henry Reaction with Acyclic Guanidine-Thiourea Bifunctional Organocatalyst.

CHEMINFORM, Issue 26 2009
Keisuke Takada
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Highly Enantioselective Aza-Henry Reaction of Ketoimines Catalyzed by Chiral N,N,-Dioxide,Copper(I) Complexes.

CHEMINFORM, Issue 16 2009
Cheng Tan
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Bifunctional-Thiourea-Catalyzed Diastereo- and Enantioselective Aza-Henry Reaction

CHEMISTRY - A EUROPEAN JOURNAL, Issue 2 2006
Xuenong Xu Dr.
Abstract Bifunctional thiourea 1,a catalyzes aza-Henry reaction of nitroalkanes with N -Boc-imines to give syn -,-nitroamines with good to high diastereo- and enantioselectivity. Apart from the catalyst, the reaction requires no additional reagents such as a Lewis acid or a Lewis base. The N-protecting groups of the imines have a determining effect on the chirality of the products, that is, the reaction of N -Boc-imines gives R adducts as major products, whereas the same reaction of N -phosphonoylimines furnishes the corresponding S adducts. Various types of nitroalkanes bearing aryl, alcohol, ether, and ester groups can be used as nucleophiles, providing access to a wide range of useful chiral building blocks in good yield and high enantiomeric excess. Synthetic versatility of the addition products is demonstrated by the transformation to chiral piperidine derivatives such as CP-99,994. [source]

ChemInform Abstract: Novel Bifunctional Chiral Thiourea Catalyzed Highly Enantioselective aza-Henry Reaction.

CHEMINFORM, Issue 37 2008
Chungui Wang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Bifunctional-Thiourea-Catalyzed Diastereo- and Enantioselective aza-Henry Reaction.

CHEMINFORM, Issue 20 2006
Xuenong Xu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

ChemInform Abstract: Oxazoline,Thiourea as a Bifunctional Organocatalyst: Enantioselective aza-Henry Reactions.

CHEMINFORM, Issue 3 2008
Yu-wei Chang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Enantioselective Aza-Henry Reaction with Acyclic Guanidine-Thiourea Bifunctional Organocatalyst

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 3 2009
Keisuke Takada
Abstract A highly enantioselective aza-Henry reaction of imines with nitromethane was achieved with a reactive guanidine-thiourea bifunctional organocatalyst affording ,-nitroamines with high enantioselectivity (up to 96% ee). The diastereo- and enantioselective version of this reaction with nitroalkanes also proceeded selectively (up to 99:1 dr with 99% ee). [source]