Zinc chloride catalyzed stereoselective construction of spiropyrazolone tetrahydroquinolines via tandem [1,5]-hydride shift/cyclization sequence
作者:Tuan Zhao、Huanrui Zhang、Longchen Cui、Jingping Qu、Baomin Wang
DOI:10.1039/c5ra18471a
日期:——
A zinc chloride catalyzed tandem 1,5-hydride shift/cyclization process to form spiropyrazolone terahydroquinoline derivatives is developed. A series of new spiropyrazolone derivatives were obtained in good to high yields with good to excellent diastereoselectivities (up to 95% yield, >95 : 5 dr). Additionally, the spiropyrazolone derivatives could be converted into the corresponding novel spriopyrazolines
An efficient domino reaction in ionic liquid: Synthesis and biological evaluation of some pyrano- and thiopyrano-fused heterocycles
作者:Narsidas J. Parmar、Rikin A. Patel、Bhagyashri D. Parmar、Navin P. Talpada
DOI:10.1016/j.bmcl.2013.01.079
日期:2013.3
An improved domino/Knoevenagel-hetero-Diels–Alder reaction of two new aldehyde substrates; 7-olefinoxy-coumarin-8-carbaldehyde and 2-alkensulfanyl-quinoline-3-carbaldehyde, with pyrazolones was studied in ionic liquid triethylammonium acetate (TEAA), affording a series of pyrazolopyran annulated-pyrano-fused coumarins, and thiopyrano-fused quinolones. Besides acting as catalyst, since no additional
An efficient synthetic strategy for the unique class of pyrazolo[1,2‐a]cinnolines was developed through a rhodium‐catalyzed oxidativecoupling of N‐aryl‐1H‐pyrazol‐5(4H)‐ones with internal alkynes. This protocol features use of the pyrazolone function in the substrate as an intrinsic directing group, hexafluoroisopropyl alcohol (HFIP) as the solvent, and mild reaction conditions as well as a wide substrate
为唯一的类吡唑并的有效的合成策略[1,2一]噌啉通过的铑催化的氧化偶合开发ñ -芳基- 1 H ^ -吡唑-5-(4 ħ) -酮与内部炔烃。该方案的特征是在底物中使用吡唑啉酮功能作为固有的导向基团,在溶剂中使用六氟异丙醇(HFIP),反应条件温和,并且底物范围广。
Quantum chemical studies and dyeing performance of some novel benzoquinoline based heterocyclic monoazo dyes on polyester fiber
作者:Nikhil M. Parekh、Suban K. Sahoo、Kalpana C. Maheria
DOI:10.1016/j.dyepig.2012.03.014
日期:2012.10
Some novel benzoquinoline based heterocyclic monoazo dyes have been derived by the diazotization of 1H-benzo[g]pyrazolo[3,4-b]quinoline-3-ylamine with various phenyl pyrazolone as coupling components. All the heterocyclic monoazo dyes have been characterized by elemental analyses and various spectral data (FT-IR, UV–Vis, 1H NMR and 13C NMR), and their 3D model structures were predicted through B3LYP/6-31G(d
通过将1H-苯并[g]吡唑并[3,4-b]喹啉-3-基胺与各种苯基吡唑啉酮作为偶合组分进行重氮化,已经得到了一些新颖的基于苯并喹啉的杂环单偶氮染料。所有杂环单偶氮染料均已通过元素分析和各种光谱数据(FT-IR,UV-Vis,1 H NMR和13 C NMR)进行了表征,并通过B3LYP / 6-31G(d,p ) 方法。聚酯纤维的染色性能可以推断,所有染料在纤维上均具有中等至极好的坚牢度。另外,还讨论了合成染料的比色研究。
Synthesis of heterocyclic monoazo dyes derived from 1H-benzo[g]pyrazolo[3,4-b]quinoline-3-ylamine: their antimicrobial activity and their dyeing performance on various fibers
作者:Nikhil M. Parekh、Kalpana C. Maheria
DOI:10.1007/s11164-011-0426-4
日期:2012.3
Heterocyclic monoazobenzoquinoline-based azo dyes have been derived by diazotization of 1H-benzo[g]pyrazolo[3,4-b]quinoline-3-ylamine with a variety of phenylpyrazolone-based coupling compounds. The synthesized dyes were characterized by determination of their percentage yield, by elemental analysis, and by UV–visible, IR, and 1H NMR spectroscopy. Dyeing performance on silk, wool, nylon, and polyester fibers was assessed. The fastness properties of the dyes on each fiber were moderate to excellent. The antimicrobial activity of the dyes at different concentrations were also examined, by use of the Kirby–Bauer disk diffusion method.