Preparation of new nitrogen-bridged heterocycles. 18. Facile formations of 3-arylpyrazolo[1,5-a]pyridines and 1-arylindolizines.

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概要

• 論文の詳細を見る

• The alkaline treatment of 1-[(substituted benzylthio)methyleneamino]pyridinium and 1-[2-(substituted benzylthio)vinyl]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-arylpyrazolo[1,5-<I>a</I>]pyridines 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.

• 公益社団法人 日本化学会の論文

著者

• Kakehi Akikazu

  Department Of Chemistry And Material Engineering Faculty Of Engineering Shinshu University

• Ito Suketaka

  Department of Applied Chemistry Faculty of Engineering Nagoya University

• Kinoshita Naosumi

  Department of Industrial Chemistry, Faculty of Engineering, Shinshu University

• Abaka Yukio

  Department of Industrial Chemistry, Faculty of Engineering, Shinshu University

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