REACTION OF 2,3-DISUBSTITUTED-N-ARYLSULFONYLAZIRIDINES WITH ISOCYANATES IN PRESENCE OF SODIUM-IODIDE - STEREOSPECIFIC CONVERSION OF N-ARYLSULFONYLAZIRIDINES TO IMIDAZOLIDINONES

The reaction of 2,3-disubstituted arylsulfonylaziridines with isocyana tes in presence of sodium iodide yielding 4,5-disubstituted-2-imidazol idinones is somewhat specific rather than a general reaction, but when ever the reaction occurs, it does so in a totally stereospecific manne r where imidazolidinones produced have the same geometric configuratio n as that of the starting aziridines. The yield of the imidazolidinone s varies (0 to 60%) depending on the nature of the substituent on the aziridine ring carbon as well as their geometry.