Cyanomethylation of 2,3,4,9-tetrahydro-1H-carbazol-1-one based on using two different reagents: Antioxidant activity and DFT studies

SERDAROĞLU G., ULUDAĞ N., Ercag E.

JOURNAL OF MOLECULAR STRUCTURE, cilt.1253, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1253
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.molstruc.2021.132262
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: Carbazoles, Biological activity, Quantum chemical calculations, Chemical reactivity, DENSITY-FUNCTIONAL THEORY, EXCITATION-ENERGIES, BASIS-SET, DERIVATIVES, HYBRID, SPECTROSCOPY, ANTICANCER, FRAMEWORK, HARDNESS, NMR
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

C-2 and C-6 monoalkyl nitrile substituted reactant (1), which constitute the tricyclic framework of carbazole derivatives along with the substructure of the Strychnos alkaloids family, have been synthesized by using different bases to produce substitution reactions. In addition, the antioxidant capacity of the synthesized compound by the CUPRAC (cupric reducing antioxidant capacity) method was evaluated and the obtained TEAC (Trolox equivalent antioxidant capacity) coefficient implied that product (2) has antioxidant feature. The B3LYP/6-311G(d,p) level calculations were performed in the gas phase, and the optimized geometries obtained from these calculations were used for the solvation media calculations. The SMD variation of the IEFPCM (polarized continuum model) was used to conduct the quantum chemical calculations in the solvent environment such as CHCl3, CH3OH, and H2O (water, epsilon=78.4). Also, the NMR chemical shifts of the products were calculated using GIAO (Gauge-Independent Atomic Orbital) approach and compared with the corresponding experimental data. The TD-DFT calculations disclosed that the observed peaks for both products were attributed to the n -> pi* and pi -> pi* excitations. Moreover, NBO analysis revealed that the n -> pi* and pi -> pi* interactions have a great importance for lowering the stabilization energy for all compounds. Also, the FMO (Frontier Moleular Orbital) analyses implied that the product P2 would prefer the intermolecular interactions would rather than the intramolecular interactions. (C) 2021 Published by Elsevier B.V.