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.
DIBAL-H促进了二烷基吡喃并[3,2- a ]咔唑的还原吡喃环的打开,可直接使用各种异戊二烯基和香叶基取代的咔唑。吡喃环的形成然后还原性开环代表了引入异戊二烯基和香叶基的新方法。在目前的工作过程中,我们完成了以下八种咔唑生物碱的首次合成:clauraila-E,7-羟基庚茶碱,7-甲氧基庚茶碱,mukoenine-B(clausenatine-A),mukoenine-A(girinimbilol),mahanimbinol (马哈宁比洛),欧司他汀-A和异莫拉利福林-B.
Semi-Synthesis of Small Molecules of Aminocarbazoles: Tumor Growth Inhibition and Potential Impact on p53
作者:Solida Long、Joana B. Loureiro、Carla Carvalho、Luís Gales、Lucília Saraiva、Madalena M. M. Pinto、Ploenthip Puthongking、Emília Sousa
DOI:10.3390/molecules26061637
日期:——
their potential effect on wild-type and mutant p53 activity using a yeast screening assay and on human tumor celllines. Naturally-occurring carbazoles 1–3 showed the most potent growth inhibitory effects on wild-type p53-expressing cells, being heptaphylline (1) the most promising in all the investigated celllines. However, compound 1 also showed growth inhibition against non-tumor cells. Conversely
Synthesis, biological evaluation and molecular modeling study of novel tacrine–carbazole hybrids as potential multifunctional agents for the treatment of Alzheimer's disease
New tacrine–carbazole hybrids were developed as potentialmultifunctional anti-Alzheimer agents for their cholinesterase inhibitory and radical scavenging activities. The developed compounds showed high inhibitory activity on acetylcholinesterase (AChE) with IC50 values ranging from 0.48 to 1.03 μM and exhibited good inhibition selectivity against AChE over butyrylcholinesterase (BuChE). Molecular
Synthesis of Prenyl- and Geranyl-Substituted Carbazole Alkaloids by DIBAL-H Promoted Reductive Pyran Ring Opening of Dialkylpyrano[3,2-<i>a</i>]carbazoles
作者:Ronny Hesse、Olga Kataeva、Arndt W. Schmidt、Hans-Joachim Knölker
DOI:10.1002/chem.201403645
日期:2014.7.28
The DIBAL‐H promotedreductivepyranringopening of dialkylpyrano[3,2‐a]carbazoles provides a direct access to a broad range of prenyl‐ and geranyl‐substituted carbazoles. Formation of a pyranring followed by reductiveringopening represents a new method for the introduction of prenyl and geranyl groups. In the course of the present work, we achieved the first total syntheses of the following eight
DIBAL-H促进了二烷基吡喃并[3,2- a ]咔唑的还原吡喃环的打开,可直接使用各种异戊二烯基和香叶基取代的咔唑。吡喃环的形成然后还原性开环代表了引入异戊二烯基和香叶基的新方法。在目前的工作过程中,我们完成了以下八种咔唑生物碱的首次合成:clauraila-E,7-羟基庚茶碱,7-甲氧基庚茶碱,mukoenine-B(clausenatine-A),mukoenine-A(girinimbilol),mahanimbinol (马哈宁比洛),欧司他汀-A和异莫拉利福林-B.
Synthesis and cytotoxic activity of the heptaphylline and 7-methoxyheptaphylline series
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.