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The synthesis of an estrone intermediate based on a new approach was studied. The construction of the basic framework was carried out in three steps from a simple styrene derivative. The crucial reaction sequence for the steroid skeleton construction relied on a Zr‐mediated cyclization (Zr‐ene reaction)/propargylation followed by a Co‐mediated diastereoselective Pauson–Khand reaction that afforded...
Arylpyridines (precursors for potential organocatalysts) are easily accesible by cobalt-catalyzed cocyclotrimerization of ortho-substituted 1-aryl-1,7-octadiynes with 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...
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