Preparation and Properties of 3-Ethyl-5:5-dimethyloxazolidine-2:4-dione

IT is stated by Spielman¹ that 3: 5: 5-trimethyl-oxazolidine-2: 4-dione can be prepared by methylating 5: 5-dimethyloxazolidine-2: 4-dione in aqueous alkaline solution with dimethyl sulphate. Spielman failed to obtain the 3-ethyl analogue by this method using diethyl sulphate. A product, m.p. 61-62°, which was regarded as the 3-ethyl analogue, was, however, obtained by the action of ethyl iodide on the silver salt of 5: 5-dimethyloxazolidine-2: 4-dione.