Naphthoquinone based chemosensors for transition metal ions: experiment and theory
作者:Prajkta Gosavi-Mirkute、Amit Patil、Dipali N. Lande、Debamitra Chakravarty、Shridhar P. Gejji、Surekha Satpute、Sunita Salunke-Gawali
DOI:10.1039/c7ra10490a
日期:——
abilities of these ligands toward transitionmetalions in methanol, methanol–water, methanol–triethylamine or methanol–water–triethylamine mixtures, stoichiometries and association constants of H-1 and H-3 have been determined. It has been shown that H-1 and H-3 coordinate to metalions via two nitrogen atoms and oxygen and exhibit remarkable selectivity towards Cu2+ ions in methanol or methanol–water
2-((吡啶-2-基)甲基氨基)萘-1,4-二酮(H-1),2-((噻吩-2-基)甲基氨基)萘-1,4-二酮(H-1)的合成与表征H-2)和2-((吡啶/噻吩-2-基)乙氨基)萘-1,4-二酮(H-3和H-4)已经被进行。确定了这些配体对甲醇,甲醇-水,甲醇-三乙胺或甲醇-水-三乙胺混合物中的过渡金属离子的分子识别能力,化学计量比以及H-1和H-3的缔合常数。已经表明,H-1和H-3通过以下方式与金属离子配位两个氮原子和一个氧原子,对甲醇或甲醇-水混合物中的Cu 2+离子表现出显着的选择性,络合过程伴随着颜色从橙色到深蓝色的变化。具有H-1,H-3的Cu 2+的LOD(检出限)分别为1.48×10 -8 mol L -1和1.59×10 -8 mol L -1。还介绍了由密度泛函理论推导的H-1至H-4的振动光谱,1 H NMR化学位移和光学性质。
Manganese(III) Acetate Initiated Oxidative Free Radical Reactions between 2-Amino-1,4-naphthoquinones and <i>β</i>-Dicarbonyl Compounds
作者:Ming-Chyuan Jiang、Che-Ping Chuang
DOI:10.1021/jo991947q
日期:2000.8.1
Electrooxidative dehydrogenative coupling of 1,4-naphthoquinones with amines: Facile access to 2-amino-1,4-naphthoquinones
作者:Xi Wu、Xiao-Jing Zhao、Lizhu Zhang、Ganpeng Li、Yonghui He
DOI:10.1016/j.tetlet.2022.154208
日期:2022.12
A mild, external oxidant- and transition-metal-free electrooxidative dehydrogenativecoupling of 1,4-naphthoquinone with amines involving C(sp2)-H functionalization to give 2-amino-1,4-naphthoquinones has been developed. This method efficiently enables the construction of the C(sp2)-N bonds to produce 2-amino-1,4-naphthoquinones in moderate to excellent yields with excellent selectivity and broad substrate