[Intramolecular cyclization of 3,6-dichloro-4-(o-nitrophenyl)pyridazine in triethyl phosphite].
D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D009943:Organophosphorus Compounds; D011724:Pyridazines
D009943:Organophosphorus Compounds; D011724:Pyridazines