作者:Jian-Jun Dai、Chi Fang、Bin Xiao、Jun Yi、Jun Xu、Zhao-Jing Liu、Xi Lu、Lei Liu、Yao Fu
DOI:10.1021/ja404217t
日期:2013.6.12
A copper-promoted trifluoromethylation reaction of aromatic amines is described. This transformation proceeds smoothly under mild conditions and exhibits good tolerance of many synthetically relevant functional groups. It provides an alternative approach for the synthesis of trifluoromethylated arenes and heteroarenes. It also constitutes a new example of the Sandmeyer reaction.
Intramolecular Radical Carboaminoxylation of Aryl Amines
作者:Armido Studer、Marcel Hartmann、Carolin Gerleve
DOI:10.1055/s-0035-1560770
日期:——
Cyclizingradicalcarboaminoxylation of various arylamines is presented. The aryl diazonium salts in situ generated from the corresponding arylamines are reduced by tetra-n-butylammonium iodide (TBAI) to give the corresponding arylradicals. These arylradicals undergo 5-exo and 6-exo cyclization. Subsequent trapping with TEMPO or various other nitroxides provides the corresponding cyclized carboaminoxylated
介绍了各种芳胺的环化自由基羧基氧基化。由相应的芳胺原位生成的芳基重氮盐被四正丁基碘化铵 (TBAI) 还原,得到相应的芳基。这些芳基经历 5-exo 和 6-exo 环化。随后用 TEMPO 或各种其他氮氧化物捕集以中等至非常好的产率提供相应的环化羧基氨基氧化产物。
The Trifluoromethylating Sandmeyer Reaction: A Method for Transforming CN into CCF<sub>3</sub>
作者:Duncan L. Browne
DOI:10.1002/anie.201308997
日期:2014.2.3
trifluoromethylate: The beneficial properties imparted by the trifluoromethylation of aromatic compounds continue to drive the discovery of novel reagents and reactions for the late‐stage introduction of such moieties. Highlighted here is the recently discovered Sandmeyer trifluoromethylation approach, which now permits aromatic amines to be substrates in a direct trifluoromethylation strategy.
Visible light-promoted carbodi(tri)fluoromethylthiolation of alkenes
作者:Wengui Wang、Shuna Gao、Zhiying Ding、Weirui Zhu、Shuya Xing、Shuai Zhao、Xinxin Shao、Shoufeng Wang
DOI:10.1016/j.jfluchem.2022.109949
日期:2022.2
A Ratiometric Acoustogenic Probe for <i>in Vivo</i> Imaging of Endogenous Nitric Oxide
作者:Christopher J. Reinhardt、Effie Y. Zhou、Michael D. Jorgensen、Gina Partipilo、Jefferson Chan
DOI:10.1021/jacs.7b10783
日期:2018.1.24
Photoacoustic (PA) imaging is an emerging imaging modality that utilizes optical excitation and acoustic detection to enable high resolution at centimeter depths. The development of activatable PA probes can expand the utility of this technology to allow for detection of specific stimuli within live-animal models. Herein, we report the design, development, and evaluation of a series of Acoustogenic Probe(s) for Nitric Oxide (APNO) for the ratiometric, analyte-specific detection of nitric oxide (NO) in vivo. The best probe in the series, APNO-5, rapidly responds to NO to form an N-nitroso product with a concomitant 91 nm hypsochromic shift. This property enables ratiometric PA imaging upon selective irradiation of APNO-5 and the corresponding product, tAPNO-S. Moreover, APNO-5 displays the requisite photophysical characteristics for in vivo PA imaging (e.g., high absorptivity, low quantum yield) as well as high biocompatibility, stability, and selectivity for NO over a variety of biologically relevant analytes. APNO-5 was successfully applied to the detection of endogenous NO in a murine lipopolysaccharide-induced inflammation model. Our studies show a 1.9-fold increase in PA signal at 680 run and a 1.3-fold ratiometric turn-on relative to a saline control.