Treatment of gamma-unsaturated oxime esters with cupric acetate or ferric chloride in acetic acid / t-butanol or in t-butanol alone leads to the formation of vinyl- or chloroalkyl- substituted Delta(1)-pyrrolines in moderate to good yield.
Herein an unprecedented iron(II)-catalyzed redox-neutral radical cascade reaction of [60]fullerene with γ,δ-unsaturated oxime esters is reported for the preparation of novel free (N–H) pyrrolidino[2′,3′:1,2]fullerenes. The transformation undergoes an intramolecular cyclization/intermolecular cyclization/oxidation/hydrolysis cascade, and features simple operation, broad substrate scope/high functional