title: Reaction of N-aminopyridinium derivatives. XIII. Syntheses of pyrazolodiazines by cyclization of N-aminodiazinium salts.
mesh_terms: D000586:Amination; D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D003979:Diazonium Compounds / Q000494:pharmacology; D011720:Pyrazoles / Q000138:chemical synthesis*; D011743:Pyrimidines / Q000138:chemical synthesis
chemical_list: D003979:Diazonium Compounds; D011720:Pyrazoles; D011743:Pyrimidines