查耳酮单电子还原为相应的自由基阴离子是激活这些分子进行后续转化的有用技术。在此,提出了在三乙醇胺作为方便的电子供体存在下并使用非均相氮化碳可见光光催化剂还原查尔酮的无金属光催化方案。该反应通过异质有机半导体的长寿命自由基种类进行。研究了反应的范围,并研究了查耳酮自由基偶联的区域选择性。(1)十个查耳酮生成选择性多取代的环戊醇,分离产率为31-73%;(2)两个带有电子给体基团的查耳酮,4-MeOC 6 H 4和2-噻吩基分别产生β-酮二烯,分离产率分别为42%和53%。(3)五氟苯基取代的查尔酮仅给出自由基偶联的产物,然后从三乙醇胺-己烷-1,6-二酮中转移氢,分离出产率为65%。两种不同查耳酮混合物的还原性交叉环二聚反应区域选择性地进行,形成了四种可能产物中的一种。通过循环伏安法和线性扫描伏安法研究了该机理,表明该反应通过质子偶联电子转移进行。
Formyl Derivatives of Amino-Substituted Polyfluorotriphenyl-4,5-dihydro-1H-pyrazoles: Synthesis and Use as Donor Blocks of Nonlinear Optical Chromophores
作者:V. V. Shelkovnikov、N. A. Orlova、I. Yu. Kargapolova、K. D. Erin、A. M. Maksimov、A. A. Chernonosov
DOI:10.1134/s1070428019100087
日期:2019.10
5-dihydro-1H-pyrazoles containing various amine residues in the fluorinated benzene ring have been synthesized and used as donor building blocks in the synthesis of donor–acceptor dyes as potential chromophores for nonlinear electro-optics. Effects of substituents in the donor and acceptor moieties of the obtained chromophores on their spectral characteristics have been studied.
Ein neuer zugang zu substituierten 5,6,7,8-tetrafluorchinolinen
作者:H.J. Bader、G. Schütz、H. Wenck
DOI:10.1016/s0022-1139(00)81952-1
日期:1986.9
The reaction of 2,3,4,5,6-pentafluorochalcones in ammonium acetate/ glacial acetic acid yields 5,6,7,8-tetrafluoroquinolines. In addition 4-pentafluorophenyl-2,6-diphenylpyridines are formed.
Synthesis of 1-[4-(1,3-diaryl-4,5-dihydro-1H-pyrazol-5-yl)-2,3,5,6-tetrafluorophenyl]piperidin-4-ols and their acrylates
作者:E. A. Soboleva、N. A. Orlova、V. V. Shelkovnikov
DOI:10.1134/s1070428017030149
日期:2017.3
(4-Hydroxypiperidin-1-yl)tetra- and -octafluorochalcones reacted with phenylhydrazine in acetic acid to give mixtures of polyfluoro-1,3,5-triaryl-4,5-dihydro-1H-pyrazoles and their O-acetyl derivatives. Analogous reactions in ethanol afforded in satisfactory yields 1-[4-(1,3-diaryl-4,5-dihydro-1H-pyrazol-5-yl)-2,3,5,6-tetrafluorophenyl]piperidin-4-ols which were treated with acryloyl chloride to obtain the corresponding acrylates that are promising as monomers for the preparation of fluorescent films.
Reactions of polyfluorinated chalcones with o-aminobenzenethiol and its zinc salt
作者:K. S. Shmuilovich、N. A. Orlova、I. V. Beregovaya、V. V. Shelkovnikov
DOI:10.1007/s11172-011-0058-2
日期:2011.2
The reactions of polyfluorochalcones with o-aminothiophenol in methanol in the presence of HCl afford polyfluorine-substituted 2,3-dihydrobenzo[b][1,5]thiazepines. In some cases, the cyclization is accompanied by fluorine substitution in the perfluorophenyl ring. Probably, the formation of thiazepines proceeds through the Michael thia-adduct. The Zn salt of o-aminothiophenol reacts with chalcones in DMF exclusively via fluorine substitution.
Reactions of polyfluorinated chalcones with hydrazine hydrate and phenylhydrazine
作者:K. S. Smuilovich、N. A. Orlova、E. V. Karpova、M. M. Shakirov、V. V. Shelkovnikov
DOI:10.1007/s11172-010-0255-4
日期:2010.7
Polyfluorinated di-and triarylpyrazolines were synthesized by the reactions of polyfluorinated chalcones with hydrazinehydrate and phenylhydrazine, respectively. Reactions of benzyl-idenepolyfluoroacetophenones with phenylhydrazine resulted in the mixtures of isomeric 1,5-diphenyl-3-polyfluoroaryl-and 1,3-diphenyl-5-polyfluoroarylpyrazolines. Fluorescence properties of the synthesized triarylpyrazolines