The palladium‐catalyzed enantioselective allylic alkylation of nonstabilized lithium enolates is a long‐standing problem in asymmetric syntheses. A protocol based upon suitable reaction conditions and appropriate ligands enables the asymmetric allylation of alkanoic‐acid esters through their lithium enolates in a direct manner that does not require detours via ester surrogates. Thus, stereogenic centers
The present invention relates to olefin metathesis processes for the manufacture of a compound of the formula (I)
which is a novel useful intermediate in the synthesis of pharmaceutically active compounds.