Dimethyl Sulfoxide Participant Iron-Mediated Cascade Oxidation/α-Formylation Reaction of Substituted 2,3-Dihydropyrroles under Air and Protonic Acid Free Condition
structurally sophisticated α-formylpyrrole derivatives in moderate to good yields has been demonstrated, involving an iron-mediated domino oxidation/formylation reaction of readily available 2,3-dihydro-1H-pyrroles in dimethylsulfoxide and air atmosphere, in which dimethylsulfoxide acts as the formyl donor. A possible mechanism is presented.