Synthesis and cytotoxic activity of the heptaphylline and 7-methoxyheptaphylline series
摘要:
Nineteen carbazole alkaloids modified from heptaphylline (I) and 7-methoxyheptaphylline (II) isolated from Clausena harmandiana were synthesized. Among these derivatives, Ih and IIi showed cytotoxicity against the NCI-H187 cell line with IC50 values of 0.02 and 0.66 mu M, respectively, which are about 138 and 4 fold stronger than the ellipticine standard. In addition, oxime Ih displayed cytotoxicity against KB cells with an IC50 value of 0.17 mu M which is about 10 times stronger than the ellipticine. This compound demonstrated weak cytotoxicity against Vero cells (IC50 = 66.01 mu M). The results show convincingly that Ih may be a promising lead for the development of cytotoxic agents. (C) 2011 Elsevier Masson SAS. All rights reserved.
Nineteen carbazole alkaloids modified from heptaphylline (I) and 7-methoxyheptaphylline (II) isolated from Clausena harmandiana were synthesized. Among these derivatives, Ih and IIi showed cytotoxicity against the NCI-H187 cell line with IC50 values of 0.02 and 0.66 mu M, respectively, which are about 138 and 4 fold stronger than the ellipticine standard. In addition, oxime Ih displayed cytotoxicity against KB cells with an IC50 value of 0.17 mu M which is about 10 times stronger than the ellipticine. This compound demonstrated weak cytotoxicity against Vero cells (IC50 = 66.01 mu M). The results show convincingly that Ih may be a promising lead for the development of cytotoxic agents. (C) 2011 Elsevier Masson SAS. All rights reserved.