Acidity constant determination of novel drug precursor benzothiazolon derivatives including acyl and piperazine moieties

SIDIR İ., SIDIR Y. G., Berber H.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.111, ss.211-216, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 111
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.saa.2013.03.071
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.211-216
  • Anahtar Kelimeler: Acidity constant, Benzothiazolon derivatives, Half-protonation value, NSAI drug, Tautomerism, SPECTROSCOPIC DETERMINATION, DISSOCIATION-CONSTANTS, CHLOROPHENYLPIPERAZINE
  • Anadolu Üniversitesi Adresli: Evet

Özet

In this study, protonation and deprotonation behaviors of eight new drug precursor benzothiazolon derivatives in all of acidic and basic scale (super acidic, pH, super basic regions) are analyzed by using UV-visible spectrophotometric technique. Acidity constants (pK(a)), elucidation of the structure and protonation mechanisms of the studied molecules are obtained. Substituent effect on acidity constant values is discussed. These molecules are protonated from oxygen atom of acetamide group in the keto form. The protonation is found to be considerably contributed by the keto form. (C) 2013 Elsevier B.V. All rights reserved.