Synthesis, Characterization, and Optimization for in Vivo Delivery of a Nonselective Isopeptidase Inhibitor as New Antineoplastic Agent
摘要:
Bis-arylidenecycloalkanones structurally related to the nonselective isopeptidase inhibitor G5 were synthesized and tested for cytotoxic activity against glioblastoma cells. Cytotoxicities correlate well with Hammett s constants for substituted arylidene groups, confirming the proposed inhibition mechanism. A new inhibitor (2c) based on the 4-hydroxycyclohexanone scaffold, which favors apoptosis over necrosis, was selected for further development. 2c inhibited representative deubiquitinases with micromolar IC50, and its proapoptotic activity was studied on several cancer cell lines. Inhibitor 2c was conjugated to PEG via dicarbamate and diester linkers. While the dicarbamate was inactive, the diester (2cPE) behaves like a prodrug and is converted into the active species 2c by secreted esterase activities. Finally, 2cPE was also tested in vivo on A549 lung carcinoma xenografts generated in mice. Intravenous treatment with 2cPE led to a significant reduction in primary tumor growth, without appreciable toxicity to mice.
DOI:
10.1021/jm501336h
作为产物:
描述:
四氢噻喃-4-酮 、 对硝基苯甲醛 在
N,N-二甲基三甲基硅胺 、 iron oxide 作用下,
以
neat (no solvent) 为溶剂,
反应 4.0h,
以72%的产率得到(3Z)-3-[(4-nitrophenyl)methylene]-4H-tetrahydrothiapyran-4-one
Proline-Catalyzed Ketone-Aldehyde Aldol Reactions are Accelerated by Water
作者:Petri Pihko、Annika Nyberg、Annina Usano
DOI:10.1055/s-2004-831296
日期:——
Proline-catalyzed aldol reactions between acetone or 4-thianone and different aldehydes are accelerated by addition of 1-10 equivalents of water to the reaction medium, allowing stoichiometric aldol reactions to proceed at acceptable rates.
An efficient and room-temperature procedure is developed for high yield synthesis of novel α,β-unsaturated derivatives of thiopyran 3 directly from ketone 1 and various aldehydes in the presence of catalytic quantities of TMSNMe2 and MgBr2˙OEt2 under solvent-free conditions. The main advantage of the procedure is that the formation of the undesired bis by-products is minimized. In addition, the procedure
Fe<sub>3</sub>O<sub>4</sub> Nanoparticles as an Efficient and Magnetically Recoverable Catalyst for the Synthesis of <font>α</font>,<font>β</font>-Unsaturated Heterocyclic and Cyclic Ketones under Solvent-Free Conditions
作者:Tooba Alishiri、Hossein A. Oskooei、Majid M. Heravi
DOI:10.1080/00397911.2013.786089
日期:2013.12.17
Abstract An efficient and green procedure has been developed for the synthesis of monoarylidenes of cyclic and heterocyclic ketones. The reaction was carried out under solvent-free conditions in the presence of a catalytic amount of nanosized magnetite (Fe3O4). The catalyst was easily removed by using an external magnet. The structures of the products were deduced from their 1H NMR, 13C NMR, and infrared
Bis-arylidenecycloalkanones structurally related to the nonselective isopeptidase inhibitor G5 were synthesized and tested for cytotoxic activity against glioblastoma cells. Cytotoxicities correlate well with Hammett s constants for substituted arylidene groups, confirming the proposed inhibition mechanism. A new inhibitor (2c) based on the 4-hydroxycyclohexanone scaffold, which favors apoptosis over necrosis, was selected for further development. 2c inhibited representative deubiquitinases with micromolar IC50, and its proapoptotic activity was studied on several cancer cell lines. Inhibitor 2c was conjugated to PEG via dicarbamate and diester linkers. While the dicarbamate was inactive, the diester (2cPE) behaves like a prodrug and is converted into the active species 2c by secreted esterase activities. Finally, 2cPE was also tested in vivo on A549 lung carcinoma xenografts generated in mice. Intravenous treatment with 2cPE led to a significant reduction in primary tumor growth, without appreciable toxicity to mice.