Synthesis of Oxazolidine‐2,4‐diones by a Tandem Phosphorus‐Mediated Carboxylative Condensation—Cyclization Reaction Using Atmospheric Carbon Dioxide.

Oxazolidine-2,4-diones [(IV), (VIII), and (X)] are conveniently synthesized via title tandem reaction in one-pot fashion using carbon dioxide under atmospheric pressure and transition-metal free conditions.