细胞内pH是与各种生物学和病理学过程相关的关键参数。在这项研究中,利用氨基型激发态分子内质子转移(ESIPT)工艺开发了比例pH荧光传感器ABTT。依靠ESIPT是否正常进行,ABTT在酸性介质中显示黄色荧光,在碱性条件下显示青色荧光。根据变化,ABTT可以作为有前途的传感器使用,它对pH的变化具有快速且可逆的响应,而不受生物物质的干扰,并输出稳定的比例信号(I 478 / I 546)。此外,由于ESIPT效应,ABTT中也显示出较大的斯托克斯位移和高量子产率。此外,ABTT被用于监测活细胞的pH变化并成功地观察到氧化应激下的pH波动。这些结果阐明了ABTT在理解pH依赖性生理和病理过程中的巨大潜力。
Herein, two kinds of structurally significant 2‐(2‐aminophenyl)benzothiazoles were selectively generated by the copper‐catalyzed aerobic C−C bond cleavage of isatins. Morpholine served not only as a reactant but a promoter in the three‐component assembly of 2‐(2‐aminophenyl)benzothiazoles. Also it proved to be an efficient additive for the formation of free amino 2‐(2‐aminophenyl)benzothiazoles. This
A robust one-pot synthesis of benzothiazoles from carboxylic acids including examples with hydroxyl and amino substituents
作者:Soraia Meghdadi、Mehdi Amirnasr、Peter C. Ford
DOI:10.1016/j.tetlet.2012.10.035
日期:2012.12
The cyclocondensation of 2-aminothiophenol and carboxylic acids to give benzothiazoles has been carried out under mild conditions using tetrabutylammonium bromide (TBAB) as the reaction medium and triphenyl phosphite as the catalyst. Shorter reaction times, rapid isolation of the products, and excellent yields are advantages of this method. The reaction is found to be general and quite tolerant to