Organoaluminum-mediated selective 1,2-rearrangement of γ,γ-disubstituted γ-amino α,β-unsaturated carbonyl compounds leading to unsymmetrically substituted pyrroles
γ,γ-Dialkyl-γ-amino-α,β-unsaturatedcarbonylcompounds were found to undergo selective skeletalrearrangement under the influence of modified organoaluminum Lewis acid to give unsymmetrically substituted pyrroles through the rapid Paal–Knorr type cyclization upon acidic hydrolysis. This new structural reorganization of amino carbonylcompounds triggered by the 1,2-alkyl shift provides a unique entry