Oligomere aus konsekutivenin situ Michael-Additionen
作者:Hans Möhrle、Martin Pycior、Detlef Wendisch
DOI:10.1002/ardp.19943270707
日期:——
Umsetzung von 2‐ und 4‐Pyridylacetonitrilen und ‐estern unter Mannich‐Bedingungen sind die Aminomethylverbindungen nicht faßbar, sondern ergeben unter spontaner Amineliminierung und Polyaddition Oligomere. Aus 2‐Pyridylacetonitril wird ein einheitliches, ataktisches Oligomer erhalten, dessen Mikrotaktizität NMR‐spektroskopisch aufgeklärt wird. 4‐Pyridylacetonitril reagiert ähnlich, aber zu einem Substanzgemisch
One-Pot Synthesis of 3-Substituted 4<i>H</i>-Quinolizin-4-ones via Alkyne Substrate Control Strategy
作者:Ji-Wang Fang、Fang-jie Liao、Yang Qian、Chao-Chen Dong、Li-Jin Xu、Han-Yuan Gong
DOI:10.1021/acs.joc.0c02484
日期:2021.2.19
Three-substituted 4H-quinolizin-4-ones were obtained via a facile method with good selectivity and high efficiency. On the basis of alkyne substrate control, the mild and cost-efficient reaction has a broad substrate scope (20 examples, up to 93% yield) and is also easy to scale up. Active sites on the products allow for further modifications. The alkyne substrate control strategy could be further
通过简便的方法以良好的选择性和高效率获得了三取代的4 H-喹啉嗪-4-酮。在炔烃底物控制的基础上,温和且经济高效的反应具有广泛的底物范围(20个实例,产率高达93%),并且也易于扩大规模。产品上的活动站点允许进一步修改。炔烃底物的控制策略可以进一步扩展,以实现更复杂的三取代的4 H -quinolizin-4-one骨架。
A simple benzothiazole-based mitochondrial-targeting fluorescent probe for visualizing and monitoring viscosity in living cell, lung organ tissue, and living mice
作者:Lijun Tang、Lei Zhou、Xiaomei Yan、Keli Zhong、Xue Gao、Xiuying Liu、Jianrong Li
DOI:10.1016/j.dyepig.2020.108644
日期:2020.11
but strong fluorescence in high-viscosity media. Linear fitting of the viscosity titration results provided a good linear relationship between the fluorescence intensity (logI583) and viscosity (logη) within the viscosity range of 13.8–221.5 cp, indicating the capability of the probe for quantitative viscosity detection. Probe HBTD-V also holds some advantages such as excellent photostability, good
不规则的细胞粘度与细胞水平上的疾病和功能障碍有关,开发一种简单而有效的荧光探针来检测细胞内粘度具有重要意义。在此,我们报告了一种基于苯并噻唑的荧光探针HBTD-V,用于对生物系统中的粘度变化进行敏感响应。HBTD-V在低粘度介质中显示弱发射,而在高粘度介质中显示强荧光。粘度滴定结果的线性拟合在13.8–221.5 cp的粘度范围内提供了荧光强度(log I 583)和粘度(logη)之间的良好线性关系,表明该探针具有定量粘度检测的能力。探测HBTD-V还具有一些优势,例如出色的光稳定性,良好的抗干扰能力和良好的线粒体靶向能力。此外,探针HBTD-V已成功用于成像活MCF-7细胞,小鼠肺脏器官和组织以及活小鼠体内的粘度变化。结果表明,HBTD-V可作为灵敏的荧光探针,用于研究粘度变化在复杂生物系统中的重要作用。