Synthesis of atropoisomeric pyridines via cobalt-catalyzed cocyclotrimerization of diynes with benzonitrile
作者:Radim Hrdina、Irena G. Stará、Lenka Dufková、Scott Mitchel、Ivana Císařová、Martin Kotora
DOI:10.1016/j.tet.2005.10.034
日期:2006.1
benzonitrile. The scope of the reaction with respect to the ortho substituents (OMe, Me, COOMe, NHCOMe, F, etc.) was investigated. Three potentially atropoisomeric arylpyridines were prepared and one of them was converted into the corresponding N-oxide and resolved into its enantiomers. The absolute configuration of the N-oxide was established by X-ray crystal structure analysis. Preliminary results