a new ferrocenophane scaffold have been prepared via a stereoselective approach. The P-cyclohexyl substituted phosphine affords high levels of asymmetric induction in the organocatalytic [3 + 2] annulation reaction between allenes and electron-poorolefins.
Starting from a 1,1′-bis-(SC)-(methoxymethyl)pyrrolidine functionalized ferrocene, an ortholithiation/iodination/chiral auxiliary removal/Suzuki coupling sequence has been achieved. It affords a convenient, stereoselective access to chiral, C2-symmetric, tetrasubstituted ferrocene derivatives of (Spl,Spl)-configuration, bearing various aryl substituents and acetoxymethyl functions. These α-acetoxy-functionalized