Syntheses of 2-Aryl Benzothiazoles via Photocatalyzed Oxidative Condensation of Amines with 2-Aminothiophenol in the Presence of BODIPY Derivatives
作者:Zeyin Zhou、Weijun Yang
DOI:10.1080/00397911.2014.932811
日期:2014.11.2
Abstract A simple, convenient, and efficientnew method for synthesis of 2-aryl benzothiazoles under mild conditions with nonmetal catalyst has been developed. Boron–dipyrromethene (BODIPY) dyes were used as photocatalysts for aerobic oxidative reactions of amine with 2-aminothiophenol. The approach will be very useful for the synthesis of benzothiazolederivatives and the development of photocatalytic
A bodipy based dual functional probe1has been designed and synthesized, which selectively detects H2S as well as monitors H2S induced apoptosis in cells.
Spectroscopic, computational modeling and cytotoxicity of a series of meso-phenyl and meso-thienyl-BODIPYs
作者:Jaime H. Gibbs、Larry T. Robins、Zehua Zhou、Petia Bobadova-Parvanova、Michael Cottam、Gregory T. McCandless、Frank R. Fronczek、M. Graça H. Vicente
DOI:10.1016/j.bmc.2013.07.017
日期:2013.9
A series of twenty-two BODIPY compounds were synthesized, containing various meso-phenyl and meso-thienyl groups, and their spectroscopic and structural properties were investigated using both experimental and computational methods. Further functionalization of the BODIPY framework via iodination at the 2,6-pyrrolic positions was explored in order to determine the effect of these heavy atoms on the photophysical and cytotoxicity of the meso-aryl-BODIPYs. BODIPYs bearing meso-thienyl substituents showed the largest red-shifted absorptions and emissions and reduced fluorescence quantum yields. The phototoxicity of the BODIPYs in human carcinoma HEp2 cells depends on both the presence of iodines and the nature of the meso-aryl groups. Six of the eleven 2,6-diiodo-BODIPYs investigated showed at least a sevenfold enhancement in phototoxicity (IC50 = 3.5-28 mu M at 1.5 J/cm(2)) compared with the non-iodinated BODIPYs, while the others showed no cytotoxicity, while their singlet oxygen quantum yields ranged from 0.02 to 0.76. Among the series investigated, BODIPYs 2a and 4a bearing electron-donating meso-dimethoxyphenyl substituents showed the highest phototoxicity and dark/phototoxicity ratio, and are therefore the most promising for application in PDT. (C) 2013 Elsevier Ltd. All rights reserved.
Convenient one-pot procedure for synthesizing 4,4′-dimethoxy-boradiaza-s-indacene dyes and their application to cell labeling
作者:Kuan-Miao Liu、Ming-Shan Tsai、Ming-Shiou Jan、Chi-Min Chau、Wan-Ju Wang
DOI:10.1016/j.tet.2011.08.043
日期:2011.10
We succeeded in developing a convenient one-pot pathway for synthesizing 4,4'-dimethoxy-boradiaza-s-indacene dyes 4a-d. The structures feature two methoxy groups in place of the fluorine atoms in 4,4'-difluoro-4-boradiaza-s-indacene. These novel dyes emitted green fluorescence and possessed moderate to high fluorescence quantum yields (Phi=0.32-0.93). We demonstrated that these dyes have applicability to cell labeling. (C) 2011 Elsevier Ltd. All rights reserved.
Design, synthesis and characterization of a novel fluorescent probe for nitric oxide based on difluoroboradiaza-s-indacene fluorophore
作者:Xian Zhang、Hua-shan Zhang
DOI:10.1016/j.saa.2004.05.041
日期:2005.4
Nitric oxide (NO) is a gaseous. free radical, which plays a role as an intracellular second messenger and a diffusible intercellular messenger. To obtain evidence for NO function in vivo, 1,3,5,7-tetramethyl-8-(4'-aminophenyl-N-(2"-amino)-phenzyl)-difluoroboradiaza-s-indacene (TMAPABODIPY) was designed and synthesized as a fluorescent probe for nitric oxide, which features high photostability and no pH dependency over a wide pH range. The fluorescence of TMAPABODIPY itself is very strong. When TMAPABODIPY traps NO in the presence of dioxygen, the weak fluorescent triazole form is obtained, which offers the advantages of specificity, and sensitivity for direct detection of NO. The relationship was obtained between the quenching fluorescence intensity and NO concentration in the range 0.02-4.0 mu mol l(-1). The detection limit is 5 nmol l(-1) (S/N = 3). The proposed method has been used to monitor the release of NO from S-nitrosocysteine, a NO-releasing agent. (c) 2004 Elsevier B.V. All rights reserved.