[EN] CHROMENE DERIVATIVES AS ANTI-INFLAMMATORY AGENTS<br/>[FR] DERIVES DE CHROMENE A TITRE D'AGENTS ANTI-INFLAMMATOIRES
申请人:PHARMACIA CORP
公开号:WO2004087687A1
公开(公告)日:2004-10-14
The subject invention concerns methods and compounds that have utility in the treatment of a condition associated with cyclooxygenase-2 mediated disorders. Compounds of particular interest are benzopyrans and their analogs defined by formula (I). Wherein Z, X, R1, R2, R3, and R4 are as described in the specification.
The base-induced formal [4+3] cycloaddition reaction of C,N-cyclic azomethine imines with aza-ortho-quinone methides, generated in situ, is reported. This protocol provided an efficient method for the synthesis of biologically important 1,2,4-triazepine derivatives, with a wide substrate scope and excellent functional-group tolerance, and it gives moderate to excellent yields under mild conditions
AsymmetricPrinscyclization of in situ generated quinone methides and o-aminobenzaldehyde has been developed with chiral phosphoric acid as an efficient catalyst. This unconventional method provides a facile access to diverse functionalized trans-fused pyrano-/furo-tetrahydroquinoline derivatives in excellent yield and with excellent diastereo- and enantioselectivities (up to 99% yield and 99% ee)
Gold(I)-Catalyzed Unprecedented Rearrangement Reaction Between 2-Aminobenzaldehydes with Propargyl Amines: An Expedient Route to 3-Aminoquinolines
作者:Nitin T. Patil、Vivek S. Raut、Valmik S. Shinde、Gaddamanugu Gayatri、G. Narahari Sastry
DOI:10.1002/chem.201103668
日期:2012.4.27
aminoquinolines: A gold(I)‐catalyzed unprecedented rearrangementreaction between 2‐aminobenzaldehydes with propargyl amine was studied. The study provided, for the first time, direct access to 3‐aminoquinolines in one step starting from readily available starting materials (see scheme). Elegantly designed experiments were employed to unravel the mechanism of this unprecedented rearrangement, which are corroborated
Synthesis of quinolines and naphthyridines via catalytic retro-aldol reaction of β-hydroxyketones with ortho-aminobenzaldehydes or nicotinaldehydes
作者:Song-Lin Zhang、Zhu-Qin Deng
DOI:10.1039/c6ob01452f
日期:——
Cu(I)-catalyzed retro-aldol reaction of β-hydroxyketones with ortho-aminobenzaldehydes and nicotinaldehydes is reported that produces a range of quinolines and naphthyridines with high efficiency and selectivity. This reaction uses β-hydroxyketones as a regiospecific ketone-protected enolate source viacopper-catalyzed retro-aldol Cα–Cβ bond cleavage. The in situ generated copper enolate undergoes kinetically