Cytotoxic 2′,5′-dihydroxychalcones with unexpected antiangiogenic activity
摘要:
A series of 2',5'-dihydroxychalcones were synthesized and evaluated for cytotoxicity against tumor cell lines and human umbilical venous endothelial cells (HUVEC). It was found that chalcones with electron-withdrawing substituents on the B ring exhibited potent cytotoxicity against a variety of tumor cell lines while compounds with electron-releasing groups ere less potent in general. Those compounds with B ring replaced by extended or heteroaromatic rings exhibited significant bioactivity. Several compounds were shown to have marked cytotoxic selectivity towards HUVECs. Especially, among the synthesized compounds. 2-chloro-2'.5'dihydroxychalcone (2-3) showed the highest selectivity index up to 66 in comparison to HCT 116 cells. This Compound also exhibited strong inhibitory effects on the HUVEC tube formation in an in vitro model. When administered into BDF1 mice bearing Lewis lung carcinoma cells at 50 mg kg(-1) day (-1), 2-3 was found to inhibit the growth of tumor mass by 60.5%. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
flavone) possess various pharmacological activities and due to its xanthine-oxidase enzyme inhibitory effect it also has superoxide-scavenging activities. A series of 2-phenyl-2,3-dihydrochromon-4-one derivatives (flavanone derivatives) were synthesized from chalcones by cyclization method and their activities were evaluated against some gram positive and gram-negative bacteria. IR, NMR and CHN analysis
4-Dimethylamino-2′,5′-dihydroxychalcone (DMADHC), a typical compound that exhibits excited-state intramolecular charge-transfer (ICT) characteristics and possesses good photophysical properties, is synthesized and used as fluoroionophore for a Fe3+ sensitive optochemical sensor. The sensor shows a linear response toward Fe3+ in the concentration range of 3.984×10−7–1.135×10−5 M with a limit of detection of 8.223×10−9 M. It exhibits excellent selectivity for Fe3+ over a large number of cations such as alkali, alkaline earth, and transitional-metal ions.
4-Dimethylamino-2′,5′-dihydroxychalcone (DMADHC) 是一种典型的化合物,具有激发态分子内电荷转移(ICT)特性和良好的光物理性质。该传感器在 3.984×10-7-1.135×10-5 M 的浓度范围内对 Fe3+ 呈线性响应,检测限为 8.223×10-9 M。
Cytotoxic 2′,5′-dihydroxychalcones with unexpected antiangiogenic activity
A series of 2',5'-dihydroxychalcones were synthesized and evaluated for cytotoxicity against tumor cell lines and human umbilical venous endothelial cells (HUVEC). It was found that chalcones with electron-withdrawing substituents on the B ring exhibited potent cytotoxicity against a variety of tumor cell lines while compounds with electron-releasing groups ere less potent in general. Those compounds with B ring replaced by extended or heteroaromatic rings exhibited significant bioactivity. Several compounds were shown to have marked cytotoxic selectivity towards HUVECs. Especially, among the synthesized compounds. 2-chloro-2'.5'dihydroxychalcone (2-3) showed the highest selectivity index up to 66 in comparison to HCT 116 cells. This Compound also exhibited strong inhibitory effects on the HUVEC tube formation in an in vitro model. When administered into BDF1 mice bearing Lewis lung carcinoma cells at 50 mg kg(-1) day (-1), 2-3 was found to inhibit the growth of tumor mass by 60.5%. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
The complexation of flavone derivatives with alkali and alkaline earth metal cations studied by spectroscopic methods
作者:Huaping Li、Hongzhi Xie、Penfei Wang、Shikang Wu
DOI:10.1039/a904825a
日期:——
A new kind of fluoroionophore, typified by flavone quasi-crown ether [4′-(dimethylamino)-3,6-(tetraethylene glycol)flavone] and flavone lariat-crown ether, were synthesized and characterized. The photophysical changes upon complexation with alkali and alkalineearthmetal cations are explained in terms of the enhancement of a cation-induced intramolecular charge transfer process, which results from