Reaction of Carbon Dioxide with 1-Phenylaziridine Catalyzed by Organo-antimony and -tin Compounds

Abstract
The reactions of carbon dioxide(CO2) with 1-phenylaziridine(1) to afford 3-phenyl-2-oxazolidone(2) were carried out in the presence of organo-antimony and -tin compounds as catalysts. Tetraphenylstibonium bromide(Ph4SbBr) and triphenyltin bromide(Ph3SnBr) were found to be active catalysts. The use of a polar aprotic solvent, such as a HMPA, provided optimal reaction conditions.