On July 31, 2004, Panchaud, Philippe; Renaud, Philippe published an article.Name: Pyridine-3-sulfonic acid The title of the article was 3-Pyridinesulfonyl azide: A useful reagent for radical azidation. And the article contained the following:
Radical azidations and carboazidations have been achieved using 3-pyridinesulfonyl azide as azidating agent. Due to its base properties and its polarity, the excess of reagent is readily removed at the end of the reaction by filtration through silica gel or by extraction with either aqueous 1M HCl or 1M CuSO4. The use of this reagent greatly facilitates the tedious purifications of the final azides frequently encountered when reactions are run according to the original procedure involving benzenesulfonyl azide. Thus, reaction of Et 2-iodoacetate with 1-octene in presence of Bu6Sn2/di-tert-Bu hyponitrite/3-pyridinesulfonyl azide in C6H6 gave 80% Et 4-azidodecanoate. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Name: Pyridine-3-sulfonic acid
The Article related to pyridinesulfonyl azide preparation reagent radical azidation, Aliphatic Compounds: Other and other aspects.Name: Pyridine-3-sulfonic acid