Three‐Component Cascade Cyclization of Nitrones, Arylsulfonyl Azides, and Isocyanides for Synthesis of 5‐Imino‐1,2,4‐Oxadiazolidines

Under the catalysis of Pd 2 (dba) 3 (10 mol%) and phosphoramidite (±)‐ L13 (20 mol%) in 1,2‐DCE at 80°C, the three‐component cascade cyclization of nitrones, arylsulfonyl azides, and isocyanides proceeded readily and delivered 5‐imino‐1,2,4‐oxadiazolidines in reasonable chemical yields. The chemical structure of one title compound has been confirmed by X‐ray diffraction analysis, and the others are suggested by inference.