Antifungal activity of alkyl and heterocyclic aza-derivatives of gossypol as well as their complexes with NaClO4 against Fusarium oxysporum f. sp. lupini
作者:Piotr Przybylski、Krystian Pyta、Dorota Remlein-Starosta、Grzegorz Schroeder、Bogumil Brzezinski、Franz Bartl
DOI:10.1016/j.bmcl.2009.02.051
日期:2009.4
Eight alkyl and six heterocyclic aza-derivatives of gossypol (2-15) have been synthesized using gossypol (1) extracted from Gossypium Herbaceum cottonseeds. The ability of gossypol aza-derivatives to form complexes with NaClO4 has been investigated by electrospray ionisation (ESI) mass spectra recorded in the positive and negative ion detection modes. The gossypol aza-derivatives have been characterized by FT-IR, H-1 and C-13 NMR spectroscopic methods and subsequently tested for their antifungal properties against Fusarium oxysporum. Four alkyl aza-derivatives (2-5), present in the enamine-enamine tautomeric form, have shown activity comparable or higher than that of gossypol against this fungus. To improve the antifungal activity the complexes of the most active compounds 2-5 with NaClO4 were prepared. Complexes of 2 and 5 with NaClO4 have shown antifungal activity higher than that of the uncomplexed compounds. (C) 2009 Elsevier Ltd. All rights reserved.