119093-47-9Relevant academic research and scientific papers
Preparation of New Nitrogen-Bridged Heterocycles. 18. Facile Formations of 3-Arylpyrazolopyridines and 1-Arylindolizines
Kakehi, Akikazu,Ito, Suketaka,Kinoshita, Naosumi,Abaka, Yukio
, p. 2055 - 2062 (2007/10/02)
The alkaline teratment of 1-pyridinium and 1-pyridinium bromides possessing an electron-withdrawing substituent such as a nitro or cyano group in the presence or absence of a dehydrogenating agent afforded the corresponding 3-arylpyrazolopyridines and 1-arylindolizines in moderate to good yields, while the reactions of the parent pyridinium salts and those having an electron-releasing group did not produce any significant products.The mode of the reaction, a ring contraction-desulfurization, is the same as that observed in related monocyclic species.
