Structural elucidation of bioactive principles in floral extracts of german chamomille (matricaria recutita l.)

• G. E BUONO-CORE ^[1] ; M. VANESSA NUÑEZ ^[1] ; ANDREA LUCERO ^[1] ; ROBINSON VARGAS M ^[3] ; CAROLINA JULLIAN ^[2]
  1. [1] Pontificia Universidad Católica de Valparaíso

     Pontificia Universidad Católica de Valparaíso

     Valparaíso, Chile

     
  2. [2] Universidad de Chile

     Universidad de Chile

     Santiago, Chile

     
  3. [3] INIA Centro Experimental de Entomología La Cruz

  Mostrar afiliaciones +
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 56, Nº. 1, 2011, págs. 549-553
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • In this work, bioactive compounds present in flower heads of German Chamomille, were extracted and isolated in pure forms by chromatographic techniques. These compounds, spiroketal enol ethers, present in both isomeric forms Z and E, were characterized and unequivocally identified by spectroscopic techniques. One- (¹H, 13C) and two-dimensional (¹H-¹H-COSY, ¹H-¹H-NOESY, HMQC and HMBC) NMR were used to assign the configuration of each isomeric compound. It was also found that irradiation of the extracts with UV light induced the photoisomerization of the en-yn-dicycloethers favoring the formation of the more stable E isomer.