SummaryA co-catalyst of (PPh3)AuCl/AgOTf for the intermolecular hydroamination of allenes with sulfonamides is shown. The reaction proceeded smoothly under mild conditions for differently substituted allenes giving N-allylic sulfonamides in good yields with high regioselectivity and E-selectivity.

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Synthesis of 3-Methyl-2-cyclohexenones Catalyzed by Mercury(II) Salts and Their Microwave Assisted BiCl3 Catalyzed AldolCondensations. -Treatment of 1,6-heptadiynes with water in the presence of HgSO4and TfOH allows mild access to 3-methyl-2-cyclohexenones. Under BiCl3 catalysis and microwave conditions the latter react regio-and stereoselectively with aromatic aldehydes to afford products of type