A New Strategy for the Synthesis of 4-Propargyl-Substituted 1H-Pyrroles from N-(5-phenyl-2,4-pentadiynyl) beta-Enaminones

Yılmaz E. S., Zora M.

CHEMISTRYSELECT, cilt.4, ss.11043-11047, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 4
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1002/slct.201902759
  • Dergi Adı: CHEMISTRYSELECT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.11043-11047
  • Anahtar Kelimeler: alkynes, heterocycles, N-propargylic beta-enaminones, nucleophilic cyclization, propargyl group, pyrroles, ONE-POT SYNTHESIS, INTRAMOLECULAR CYCLIZATION, MEDICINAL CHEMISTRY, TERMINAL ALKYNES, POLYSUBSTITUTED PYRROLES, CLAISEN REARRANGEMENT, SUBSTITUTED PYRROLES, SELECTIVE SYNTHESIS, CASCADE SYNTHESIS, EASY ACCESS
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A new method for the synthesis of 4-propargyl-substituted 1H-pyrroles is described. When treated with sodium hydride in refluxing dichloromethane, N-(5-phenyl-2,4-pentadiynyl) beta-enaminones, synthesized by the coupling of N-propargylic beta-enaminones with phenylacetylene, afforded 4-propargyl-substituted pyrrole derivatives. This conversion was general for a variety of N-(5-phenyl-2,4-pentadiynyl) beta-enaminones and displayed broad functional group tolerance. During the reaction, not only cyclization of linear precursors to pyrrole ring takes place, but also propargyl group is introduced to pyrrole core in one-pot. The enrichment of pyrrole compounds with a propargyl unit might exhibit potential for the synthesis of heterocyclic molecules of pharmacological interest.