Stereoselective photochemistry of substituted chalcones in solution and their antioxidant activities


YAYLI N. , GOK Y., UCUNCU O. , YASAR A. , ATASOY C. , SAHINBAS E., ...More

Journal of Chemical Research, no.3, pp.155-159, 2005 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2005
  • Doi Number: 10.3184/0308234054213573
  • Title of Journal : Journal of Chemical Research
  • Page Numbers: pp.155-159
  • Keywords: Antioxidants, Chalcones, Cyclobutanes, Photodimerisation

Abstract

Three new δ-truxinic type cyclobutanes [(1β,2α)-di-(4- ethylbenzoyl)-(3β,4α)-di-(4-methoxyphenyl)cyclobutane (4), (1β,2α)-di-(4-nitrobenzoyl)-(3β,4α)-di-(4-ethylphenyl) cyclobutane (5), and (1β,2α)-di-(4-ethylbenzoyl)-(3β,4α)- di-(4-ethylphenyl) cyclobutane (6)] have been prepared by stereoselective photodimerisation of the corresponding chalcone monomers (1-3) in solution. NMR and MS of the dimers are discussed. The precursor chalcones and the dimeric products showed antioxidant activities to different extents with respect to the individual compounds as well as to the antioxidant methods used.