Furan Oxidation-Cyclization to Oxazepines: Favoring 7-exo-trig over 6-endo-trig and 5-exo-trig Trajectories

Albayrak Halac F., Aydın Kandemir B. N., SEÇEN H., Fleming F. F., Altundas R.

Organic letters, cilt.27, sa.49, ss.13408-13411, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 49
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1021/acs.orglett.5c03626
  • Dergi Adı: Organic letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, Chimica, MEDLINE, Nature Index
  • Sayfa Sayıları: ss.13408-13411
  • Atatürk Üniversitesi Adresli: Evet

Özet

The sequential oxidation-cyclization of hydroxyaminoalkylfurans to oxazepines is controlled by a regioselective 7-exo-trig cyclization rather than the usually more favorable, 6-endo-trig and 5-exo-trig cyclizations. The key trajectory determinant is the generation of Z-dienones, which place the terminal substituents in close proximity. The versatile furan approach to oxazepines exploits an underdeveloped stereochemical feature allowing an efficient, regioselective, and robust route to variously substituted oxazepines ideal for bioactive discovery.