From Rare Reagents to Rare Products: Regiospecific Silver‐Catalyzed [3+2] Cycloaddition of Aryl‐, Alkyl‐ and Aminosulfonyl Diazomethanes with Arenediazonium Tosylates

The scope of silver nitrate-catalyzed cycloaddition of arenediazonium salts has been expanded to include aryl- and alkylsulfonyl diazomethanes as well as the recently introduced diazomethyl sulfonamides. The reliance on these two classes of diazo compounds led to a new synthetic approach to the rare 2-aryltetrazol-5-yl sulfones as well as to the synthesis of hitherto not described 2-aryltetrazol-5-yl sulfonamides.