One-Pot Synthesis of 2-Acetyl-1 H-pyrroles from N-Propargylic β-Enaminones via Intermediacy of 1,4-Oxazepines
Journal of Organic Chemistry, cilt.86, sa.9, ss.6289-6304, 2021 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 86 Sayı: 9
- Basım Tarihi: 2021
- Doi Numarası: 10.1021/acs.joc.1c00077
- Dergi Adı: Journal of Organic Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Chemical Abstracts Core, Chimica, Compendex, EMBASE, MEDLINE
- Sayfa Sayıları: ss.6289-6304
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
© 2021 American Chemical Society.A one-pot two-step protocol for the synthesis of 2-acetyl-1H-pyrroles from N-propargylic β-enaminones was described. When treated with zinc chloride in refluxing chloroform, N-propargylic β-enaminones produced in situ 2-methylene-2,3-dihydro-1,4-oxazepines, which, upon further refluxing in methanol with zinc chloride, afforded 2-acetyl-1H-pyrroles. The process was found to be general for a wide variety of N-propargylic β-enaminones and yielded a diverse range of 2-acetyl-1H-pyrroles in good to high yields with large substrate scope and good functional group tolerance. This operationally easy method may provide a rapid access to functionalized 2-acetyl-1H-pyrroles of pharmacological interest.