Preparation and antitrypanosomal activity of secochiliolide acid derivatives
摘要:
Secochiliolide acid (1) isolated from the Patagonian shrub Nardophyllum biyoides, was used as a scaffold for the preparation of a series of nine derivatives. Compound 1 and its derivatives were tested against Trypanosoma cruzi epimastigotes grown in liquid media. It was first observed that secochiliolide acid (1) inhibited the proliferation of the parasites, with an IC50 of 2 mu g/mL. Six of the synthesized derivatives were also active with IC50's between 2 and 7 mu g/mL which are comparable to that of the commercial drug benznidazole (2.5 mu g/mL). These results indicate that the carboxyl group is not essential for the bioactivity of 1, while the presence of the tetrasubstituted exocyclic double bond seems to be important. Moreover, the presence of the furan and spirolactone rings is not essential for the bioactivity per se, but is important in combination with other structural fragments present in the molecule. (C) 2013 Elsevier Ltd. All rights reserved.
From the aerial parts of in addition to known compounds nine diterpenes were isolated, three isolabdanes, three seco-isolabdanes, a cis-clerodane, a rearranged dilactone and a geranyl geraniol derivative. The aerial parts of gave two of the new diterpenes and three further diterpenes which are closely related to those of the species. Further-more two new geranyl geraniol derivatives were present. The
Preparation and antitrypanosomal activity of secochiliolide acid derivatives
作者:Gastón E. Siless、Esteban Lozano、Marianela Sánchez、Marcia Mazzuca、Miguel A. Sosa、Jorge A. Palermo
DOI:10.1016/j.bmcl.2013.06.064
日期:2013.9
Secochiliolide acid (1) isolated from the Patagonian shrub Nardophyllum biyoides, was used as a scaffold for the preparation of a series of nine derivatives. Compound 1 and its derivatives were tested against Trypanosoma cruzi epimastigotes grown in liquid media. It was first observed that secochiliolide acid (1) inhibited the proliferation of the parasites, with an IC50 of 2 mu g/mL. Six of the synthesized derivatives were also active with IC50's between 2 and 7 mu g/mL which are comparable to that of the commercial drug benznidazole (2.5 mu g/mL). These results indicate that the carboxyl group is not essential for the bioactivity of 1, while the presence of the tetrasubstituted exocyclic double bond seems to be important. Moreover, the presence of the furan and spirolactone rings is not essential for the bioactivity per se, but is important in combination with other structural fragments present in the molecule. (C) 2013 Elsevier Ltd. All rights reserved.