A new ring contraction rearrangement of 2,5-and 3,6-di-tert-butyl-3H-azepines to pyridine derivatives

Kyosuke Satake, Koichi Takaoka, Michiaki Hashimoto, Hideki Okamoto, Masaru Kimura, Shiro Morosawa

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A new ring contraction reaction giving pyridine derivatives from 3,6-and 2,5-di-tert-butyl-3H-azepines was observed by a successive treatment with bromine and aqueous K2CD3. A plausible mechanism via azatropilium cation for the rearrangement was discussed based on the product's distribution from respective 3H-azepines.

Original languageEnglish
Pages (from-to)1129-1130
Number of pages2
JournalChemistry Letters
Issue number12
Publication statusPublished - Jan 1 1996


ASJC Scopus subject areas

  • Chemistry(all)

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