chloride progressed smoothly, forming the corresponding isocyanate, which in turn gave quantitatively the corresponding bifunctional acylurea on treatment with aniline in all cases except phthaloyl isocyanate. In the reaction of succin- or adipamide, however, the amide required a large amount of oxalyl chloride, and in addition to the expected isocyanate, 1,2-bis[2-(1,3-oxazolidine-4,5-dione)] ethanediylidene