Journal of the American Chemical Society, Vol.133, No.6, 1769-1771, 2011
Gold-Catalyzed Stereoselective Synthesis of Azacyclic Compounds through a Redox/[2+2+1] Cycloaddition Cascade of Nitroalkyne Substrates
We report a new redox/cycloaddition cascade on readily available 1-alkynyl-2-nitrobenzenes that produces complex azacyclic compounds stereoselectively. The core structures of the resulting products are constructed through a formal [2 + 2 + 1] cycloaddition among a-carbonyl carbenoids, nitroso species, and external alkenes.