REACTION OF N-ACYLTHIOUREAS WITH ELECTROPHILIC REAGENTS SYNTHESIS OF 1,3,5-OXADIAZINIUM SALTS, 1,2,4-DITHIAZOLIUM SALTS AND BENZOTHIAZOLES

Article abstract of DOI:10.1016/S0040-4020(01)96792-4

N-Acylthioureas 1 can be easily transformed into 2,4-diamino-6-aryl-1,3,5-oxadiazinium salts 12, 2,4-diamino-6-aryl-1,3,5-thiadiazinium salts 13, 3-amino-5-aryl-1,2,4-dithiazolium salts 19 and 2-acylimino-benzothiazolines 22, respectively by reaction with