The clean and mild synthesis, crystal structure, and intra-molecular hydrogen bond study of substituted new 4,8-dihydropyrano[3,2-b]-pyrans containing chlorokojic acid moiety

Aghbash K. O., Pesyan N. N., Marandi G., DEGE N., ŞAHİN E.

RESEARCH ON CHEMICAL INTERMEDIATES, cilt.45, sa.9, ss.4543-4554, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 9
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s11164-019-03848-7
  • Dergi Adı: RESEARCH ON CHEMICAL INTERMEDIATES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4543-4554
  • Anahtar Kelimeler: Chlorokojic acid, Isocyanides, Acetylene esters, Nucleophilic addition, 4H-Pyran, 4, 8-Dihydropyrano[3, 2-b]-pyran, Intramolecular H bond, Inversion dimers, DERIVATIVES, ANTICONVULSANT, ISOCYANIDES
  • Atatürk Üniversitesi Adresli: Evet

Özet

A safe, green and convenient process was developed for the synthesis of a novel group of 4,8-dihydropyrano[3,2-b]-pyrans by dialkyl acetylenedicarboxylates and alkyl isocyanides being trapped by chlorokojic acid in good to excellent yields at ambient temperature. Characterization of all structures was carried out by FT-IR and H-1 and C-13 NMR spectrometers, and two compounds were analyzed using X-ray diffraction technique. Crystal structures showed an intramolecular hydrogen bond and stacking of the dimeric (RS) molecules with the unit cell along the a-axis.