Silver‐catalyzed Regioselective Synthesis of N‐aryl‐1H‐pyrazolyl‐substituted Benzenesulfonamides from Ynamides and Pyrazoles

Silver‐catalyzed N‐aryl‐1H‐pyrazolyl substituted benzenesulfonamide derivatives were obtained regioselectively from ynamides and pyrazoles. In this intermolecular organic transformation, several substituted benzenesulfonamides were obtained in good to excellent yields by forming a new C−N bond under mild reaction conditions. Silver‐catalyzed regioselective synthesis of N‐aryl‐1H‐pyrazolyl substituted benzenesulfonamide derivatives were achieved from ynamides and pyrazoles. Benzenesulfonamides were prepared with good to excellent yields from substituted pyrazoles via silver‐catalyzed intermolecular organic transformations, and one new C−N bond was formed under mild reaction condition.