Directed C–C bond cleavage of a cyclopropane intermediate generated from<i>N</i>-tosylhydrazones and stable enaminones: expedient synthesis of functionalized 1,4-ketoaldehydes
-quaternary centers via regioseletive C-C bond activation has been described. Through cyclopropanation of bench-stable enaminones with in situ generated diazo reagents from N-tosylhydrazones, followed by selective C-C bond cleavage of the cyclopropane ring affords the 1, 4-ketoaldehyde derivatives in good to excellent yields. This method works with broad substrate scope and high regioseletivity.
The present invention provides compounds useful as inhibitors of Raf protein kinase. The present invention also provides compositions thereof, and methods of treating Raf-mediated diseases.
Heterocyclic Compounds Useful as RAF Kinase Inhibitors
申请人:Cossrow Jennifer
公开号:US20090005359A1
公开(公告)日:2009-01-01
The present invention provides compounds useful as inhibitors of Raf protein kinase. The present invention also provides compositions thereof, and methods of treating Raf-mediated diseases.