PhI(OAc)2–BF3–OEt2 mediated domino imine activation, intramolecular C–C bond formation and β-elimination: new approach for the synthesis of fluorenones, xanthones and phenanthridines†
Abstract
PhI(OAc)2–BF3–OEt2 mediated domino synthesis of biologically important fluorenones, xanthones and phenanthridines has been developed. The reaction proceeds through imine activation, intramolecular C–C bond formation and β-elimination.