Enantioselective Addition of Nitromethane to 2-Acylpyridine N-Oxides. Expanding the Generation of Quaternary Stereocenters with the Henry Reaction
摘要:
The direct asymmetric Henry reaction with prochiral ketones, leading to tertiary nitroaldols, is an elusive reaction so far limited to a reduced number of reactive substrates such as trifluoromethyl ketones or alpha-keto carbonyl compounds. Expanding the scope of this important reaction, the direct asymmetric addition of nitromethane to 2-acylpyridine N-oxides catalyzed by a BOX-Cu(II) complex to give the corresponding pyridine-derived tertiary nitroaldols having a quaternary stereogenic center with variable yields and good enantioselectivity, is described.
catalytic asymmetric Henry reaction of α-keto esters, 2-acylpyridines and 2-acylpyridine N-oxides. The corresponding β-nitro-α-hydroxy esters were obtained in good to excellent yields (up to 99%) with a high enantiomeric excess (ee) (up to 94%) with a catalyst loading of 1–2 mol%. The desired products of 2-acylpyridines and 2-acylpyridine N-oxides, which were simple methyl ketones, were obtained in medium
The invention provides compounds of formula II:
and pharmaceutically acceptable salts thereof. The formula II thiazolyl compounds inhibit tyrosine kinase activity thereby making them useful as anticancer agents and for the treatment of Alzheimer's Disease.
[EN] THIAZOLYL COMPOUNDS USEFUL AS KINASE INHIBITORS<br/>[FR] UTILISATION DE COMPOSÉS THIAZOLYLE COMME INHIBITEURS DE KINASES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2008079873A2
公开(公告)日:2008-07-03
[EN] The invention provides compounds of formula I [INSERT CHEMICAL STRUCTURE HERE] (I) and pharmaceutically acceptable salts thereof. The formula I thiazolyl compounds inhibit tyrosine kinase activity thereby making them useful as anticancer agents and for the treatment of Alzheimer's Disease. [FR] Cette invention concerne des composés de formule I et leurs sels pharmaceutiquement acceptables. Les composés thiazolyle de formule I inhibent l'activité des tyrosine kinases, ce qui les rend utiles comme agents anticancéreux, ainsi que dans le traitement de la maladie d'Alzheimer.
THIAZOLYL COMPOUNDS USEFUL AS KINASE INHIBITORS
申请人:Marinier Anne
公开号:US20100048581A1
公开(公告)日:2010-02-25
The invention provides compounds of formula I [INSERT CHEMICAL STRUCTURE HERE] (I) and pharmaceutically acceptable salts thereof. The formula I thiazolyl compounds inhibit tyrosine kinase activity thereby making them useful as anticancer agents and for the treatment of Alzheimer's Disease.