Synthesis of Novel Spin‐Labeled Derivatives of Podophyllotoxin as Potential Antineoplastic Agents
摘要:
Five novel nitroxyl spin-labeled ester derivatives of podophyllotoxin have been prepared by reacting the corresponding N-(1-oxyl-2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl) amino acids with the hydroxy group of podophyllotoxin in the presence of dimethylaminopyridine and N,N-dicyclohexylcarbodiimide and evaluated as potential antitumor agents. All of the target compounds showed more significant cytotoxicity against P-388 murine leukemia and A-549 human lung carcinoma in vitro than etoposide.
Synthesis of new conformationally rigid paramagnetic α-amino acids
摘要:
A pyrroline nitroxide based cyclic tetrasubstituted alpha-amino acid and paramagnetic homoproline and their derivatives are described. Introduction of a new paramagnetic protecting group to follow the incorporation of an amino acid into peptides by EPR is also suggested. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis and mechanistic studies of novel spin-labeled combretastatin derivatives as potential antineoplastic agents
作者:Ying-Qian Liu、Xiao-Jing Li、Chun-Yan Zhao、Xiang Nan、Jing Tian、Susan L. Morris-Natschke、Zhi-Jun Zhang、Xiao-Ming Yang、Liu Yang、Lin-Hai Li、Xing-Wen Zhou、Kuo-Hsiung Lee
DOI:10.1016/j.bmc.2012.12.046
日期:2013.3
Two series (14a–d and 21a–h) of novel spin-labeled combretastatin derivatives were synthesized and evaluated for cytotoxicity against four tumor cell lines (K562, SGC-7901, Hela and HepG-2). Simultaneously, a representative compound 21a was selected to investigate the antitumor mechanisms of these synthetic compounds. The results indicated that some of the compounds showed significant cytotoxicity
Design, synthesis and cytotoxic activity of novel spin-labeled rotenone derivatives
作者:Ying-Qian Liu、Emika Ohkoshi、Lin-Hai Li、Liu Yang、Kuo-Hsiung Lee
DOI:10.1016/j.bmcl.2011.12.024
日期:2012.1
Three series of novel spin-labeled rotenonederivatives were synthesized and evaluated for cytotoxicity against four tumor cell lines, A-549, DU-145, KB and KBvin. All of the derivatives showed promising in vitro cytotoxic activity against the tumor cell lines tested, with IC50 values ranging from 0.075 to 0.738 μg/mL. Remarkably, all of the compounds were more potent than paclitaxel against KBvin
Synthesis of novel spin-labeled derivatives of 5-FU as potential antineoplastic agents
作者:Liu Yang、Mei-Juan Wang、Zhi-Jun Zhang、Susan L. Morris-Natschke、Masuo Goto、Jing Tian、Ying-Qian Liu、Chih-Ya Wang、Xuan Tian、Xiao-Ming Yang、Kuo-Hsiung Lee
DOI:10.1007/s00044-013-0906-8
日期:2014.7
treatment option for various cancers, including lung cancer. In order to find compounds with superior bioactivity and less toxicity against lung cancer, novel spin-labeled 5-fluorouracil (5-FU) derivatives (3a–f) were synthesized and evaluated against four human tumor cell lines (A-549, DU-145, KB, and KBvin). Two promising compounds 3d and 3f exhibited IC50 values of 2.76 and 2.38 μM, respectively
Deoxypodophyllotoxin inhibits tubulin polymerization and induces cell cycle arrest at G2/M, followed by apoptosis. In order to find compounds with superior bioactivity and less toxicity, a series of spin-labeled derivatives of deoxypodophyllotoxin were synthesized by reacting 4'-demethyl-4-deoxypodophyllotoxin (DPPT) with N-(1-oxy1-2,2,6,6-tetramethyl-4-piperidinyloxycarbonyl) amino acids. The cytotoxic activities against three tumor cell lines (HL-60, RPMI-8226, A-549) in vitro and the antioxidative activities in tissues of Sprague Dawley (SD) rats of target compounds were evaluated, and the results indicated that compounds 11a-h were more potent in terms of cytotoxicities and antioxidative activities than either parent compound DPPT or anticancer drug VP-16. (C) 2009 Elsevier Masson SAS. All rights reserved.
Novel semisynthetic spin-labeled derivatives of podophyllotoxin with cytotoxic and antioxidative activity
A series of novel spin-labeled podophyllotoxin derivatives were synthesized by reacting the corresponding N-(1-oxyl-2,2,6,6-tetramethyl-4-piperidinyloxy carbonyl)-amino acids with 4 beta-amino-4'-demethylepipodophyllotoxin. The synthesized derivatives 12a-g were evaluated for the partition coefficients, cytotoxicities in vitro against three tumor cell lines (A-549, HL-60, and RPMI-8226) and antioxidative activities in tissues of SD rats by the TBA method. The vast majority of target compounds have shown superior or comparable activities against A-549, HL-60, and RPMI-8226 compared to VP-16, and they have shown more significant antioxidative activities and superior water solubility than VP-16. (c) 2009 Elsevier Ltd. All rights reserved.