Abstract A novel, convenient, efficient, three??step, one??pot synthesis of 2??oxazolidinones from phenyl 2??hydroxyalkyl selenides was developed. Using this methodology, 2?? oxazolidinones are obtained in good yields (76–85%) by reaction of phenyl 2??hydroxyalkyl selenides with benzoyl isocyanate and subsequent oxidation/cyclization, followed by hydrolysis with hydrochloric acid solution.