Cremlyn, Richard J.; Jones, Graham P.; Swinbourne, Fred J.; Yung, Kin published an article in 1980, the title of the article was Some reactions of pyridine-3-sulfonyl chloride.Reference of Pyridine-3-sulfonic acid And the article contains the following content:
Reaction of pyridine-3-sulfonyl chloride-HCl (I) with hydrazine gave the hydrazide from which a semicarbazide and a series of hydrazones were obtained. The chem. shifts of the NH protons of the hydrazones were correlated with the Hammett σ-constants of the substituents. With NaN3 I gave the azide which reacted with both norbornene and Ph3P. I was hydrolyzed to the sulfonic acid by boiling with EtOH. Reaction of the hydrazide with β-diketones afforded the pyrazoles, e.g. II. The intermediate sulfonohydrazones were isolated in each case; however, the product with Et acetoacetate could not be cyclised to the pyrazole. The mass spectra of the pyrazoles are briefly discussed. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Reference of Pyridine-3-sulfonic acid
The Article related to pyridinesulfonyl chloride reaction, nmr pyridinesulfonyl hydrazone hammett constant, pyrazole pyridylsulfonyl, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Reference of Pyridine-3-sulfonic acid