Abstract Carbonyl diisocyanate (1) reacts with primary amides to give 1-acylated isocyanuric acids (5, 6). With secondary amides, 1 affords the rather instable oxadiazinediones 4, which for certain substituents rearrange to give triazines (5, 10). With nucleophiles, compounds 4 give oligourets, eg with ureas pentaurets (11, 12) were obtained. Carbonyl diisocyanate reacts with hydrogen halides to afford the crystalline urea-1, 3-dicarbonyl halides 13a–c. ...
