Reference of 28682-73-7, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 28682-73-7, 4,5-Diaminopyridazin-3(2H)-one, introducing its new discovery.
S-Demethylation of Nitrogen Heterocycles
When 3-chloro-4,5-diaminopyridazine (2) was treated with sodium methylmercaptide in refluxing N,N-dimethylformamide, two heterocycles were formed and isolated, neither of which was the expected 3-methylthio-4,5-diaminopyridazine (3).A thorough spectral analysis of these heterocycles showed them to be 4-methylthioimidazo<4,5-d>pyridazine (5) and imidazo<4,5-d>pyridazine-4-thione (6).N,N-Dimethylformamide was found to provide the one carbon unit required for the formation of 5.The origin of 6 was shown to be a result of S-demethylation of 5.S-Demethylation of 3 could also be effected with sodium methylmercaptide in methyl sulfoxide without the occurrence of annulation.In methyl sulfoxide the process of demethylation was accelerated and occurred at lower temperature.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Reference of 28682-73-7. In my other articles, you can also check out more blogs about 28682-73-7
Reference£º
Pyridazine – Wikipedia,
Pyridazine | C4H4N527 – PubChem