In addition to Diels-Alder and hetero-Diels-Alder reactions, tetrafluoro-o-benzoquinone (o-fluoranil) undergoes nucleophilic additions, addition-eliminations, dioxole formation, and charge-transfer complexation, reacting at every site on the molecular skeleton. It also effects dehydrogenations and other oxidations. The quinone can function as a (CF)(4) synthon.
In addition to Diels-Alder and hetero-Diels-Alder reactions, tetrafluoro-o-benzoquinone (o-fluoranil) undergoes nucleophilic additions, addition-eliminations, dioxole formation, and charge-transfer complexation, reacting at every site on the molecular skeleton. It also effects dehydrogenations and other oxidations. The quinone can function as a (CF)(4) synthon.
The photocatalytic C–F bond cleavage in pentafluorobenzoicacid (PFBA) with TiO2-P25 using UV-C light has been investigated under different conditions. Complete cleavage of C–F is observed with TiO2-P25 under UV-C light irradiation. Oxidants such as IO4−, BrO3−, S2O82−, H2O2 and ClO3− ions enhance the defluoridation of PFBA. The order of their activities is IO4− > H2O2 > S2O82− ≈ BrO3− > ClO3−. C–F
已经研究了在不同条件下用TiO 2 -P25在五氟苯甲酸(PFBA)中用TiO 2 -P25进行的光催化C-F键裂解。TiO 2 -P25在UV-C光照射下观察到CF的完全裂解。氧化剂如IO 4 - ,的BrO 3 -,S 2 ö 8 2-,H 2 ö 2和C10 3 -离子增强PFBA的除氟。它们的活动顺序为IO 4 − > H 2 O 2 > S 2 O 8 2− ≈BrO 3- > CLO 3 -。氟离子的裂解也受无机阴离子和金属离子添加的影响。通过GC-MS技术分析脱氟中间体。
Interaction of pentafluorophenol with lead tetraacetate in acids
作者:V.N. Kovtonyuk、L.S. Kobrina、G.G. Yakobson
DOI:10.1016/s0022-1139(00)85195-7
日期:1985.5
The ability of polyfluorinated hydroxyaromatic compounds to be oxidised by radical and ionic mechanisms is discussed. Oxidation of pentafluorophenol by leadtetraacetate in hydrogen fluoride and trifluoroacetic acid gave the products of a reaction proceeding by an ionic mechanism-hexafluorocyclo- hexa-2,5-dienone and trifluoroacetoxydienones respectively.
Synthesis and Optical Properties of Diaza- and Tetraazatetracenes
作者:Benjamin D. Lindner、Jens U. Engelhart、Michaela Märken、Olena Tverskoy、Anthony L. Appleton、Frank Rominger、Kenneth I. Hardcastle、Markus Enders、Uwe H. F. Bunz
DOI:10.1002/chem.201103227
日期:2012.4.10
of an aromatic diamine with an ortho‐quinone/diethyloxalate followed by chlorination with POCl3 to give diazatetracenes or by palladium‐catalyzed coupling of a phenylenediamine with various 2,3‐dichloroquinoxalines to give tetraazatetracenes (after oxidation with MnO2). Representative examples included halogenated and nitrated derivatives. The optical properties of these azatetracenes were discussed
通过芳族二胺与邻苯二醌/二乙基草酸酯缩合,然后用POCl 3氯化,制得一系列功能化的二氮杂和四氮杂戊酸酯,或通过钯催化的苯二胺与各种2,3-二氯喹喔啉的钯催化偶联。得到四氮杂trace烷(用MnO 2氧化后)。代表性实例包括卤化和硝化衍生物。讨论了这些氮杂环丁烷的光学性质及其分子结构和取代方式。重氮trace和四氮trace形成了两个不同的组,它们具有明显不同的电子结构和性质。此外,合成了1,2,3,4-四氟-6,11-双((三异丙基甲硅烷基)乙炔基)苯并[ b ]吩嗪,这是第一个报道的氟化重氮az。报告了该化合物的单晶X射线分析。
Photochemistry of <i>o</i>-Fluoranil
作者:Vivek Kumar、David M. Lemal
DOI:10.1021/jo300506e
日期:2012.6.1
Initial exploration of the photochemicalbehavior of o-fluoranil has revealed dimer formation, cycloaddition to alkenes, and hydrogen abstraction from hydrocarbons, aldehydes, and ethers.
Alkynylated Phenazines: Synthesis, Characterization, and Metal-Binding Properties of Their Bis-Triazolyl Cycloadducts
作者:Jonathan J. Bryant、Yexiang Zhang、Benjamin D. Lindner、Evan A. Davey、Anthony Lucas Appleton、Xuhong Qian、U. H. F. Bunz
DOI:10.1021/jo3012978
日期:2012.9.7
have synthesized a series of ethynylated phenazines and their bis-triazolyl cycloadducts to serve as metal ion sensors. Binding of metal ions is achieved through coordination to the phenazine nitrogen atom and the triazole ring. To allow metal sensing in aqueous solution, the triazole units are substituted with water-soluble ethylene glycol chains. These phenazine cycloadducts exhibit a selective affinity