循环伏安法和控制电位(本体)电解已用于研究在含0.10 M高氯酸四甲基铵(TMAP)或高氯酸四正丁铵(TBAP)的二甲基甲酰胺(DMF)中碳电极上邻苯二甲酸酯的直接还原。用玻璃碳电极记录的循环伏安图分别显示一个阴极峰和一个相应的阳极峰,这分别是由于邻苯二甲酸酯的单电子还原生成自由基阴离子中间体和中间体的再氧化而产生的。在100 mV s -1的扫描速率下,观察到准可逆的行为(由于自由基阴离子的开环),而在5 V s -1时则观察到完全可逆的行为或更高。循环伏安图的数字仿真表明,自由基阴离子的寿命为3.5 s。在网状玻璃碳阴极上进行邻苯二甲酰亚胺的批量电解,所得到的产物取决于用于分析阴极电解液的程序。将阴极电解液直接注入气相色谱仪显示,邻苯二甲酸酯和2-甲基苯甲酸酯带有来自支持电解质阳离子的烷基部分。但是,如果在气相色谱分析之前将阴极电解液分配在乙醚和盐酸水溶液之间,则会观察到邻苯二甲酸盐和
[EN] INDUSTRIAL METHODS FOR PRODUCING ARYLSULFUR PENTAFLUORIDES<br/>[FR] PROCÉDÉS INDUSTRIELS POUR PRODUIRE DES PENTAFLUORURES D'ARYLSOUFRE
申请人:UBE INDUSTRIES
公开号:WO2012111839A1
公开(公告)日:2012-08-23
Industrial methods for producing arylsulfur pentafluorides are disclosed. Methods include reacting arylsulfur halotetrafluoride with hydrogen fluoride in the absence or presence of one or more additives selected from a group of fluoride salts, non-fluoride salts, and unsaturated organic compounds to form arylsulfur pentafluorides.
Palladium-Catalyzed Cross-Coupling Reactions of Carboxylic Anhydrides with Organozinc Reagents
作者:Donghui Wang、Zhaoguo Zhang
DOI:10.1021/ol035801w
日期:2003.11.1
[reaction: see text] Negishi-type cross-coupling reaction was effected by employing organozincs and anhydrides or mixedanhydrides that formed in situ fromsodiumsalts of the corresponding acids and ethyl chloroformate under the catalysis of palladium(0). A general method for preparing symmetrical/unsymmetrical ketones was developed.
The syntheses of 32 complexes of the type (η-C5H5)2Ti(OOCC6H4X)2 are reported together with their mass, 1H NMR, 13C NMR, mid- and far-IR spectra. The data are consistent with a model in which the TiOOC bond strength (weaker than that of TiCp and TiHal) is stabilized by electron-withdrawing substituents X on the phenyl rings. The electronic influence of X also extends into the cyclopentadienyl rings
的类型的32种复合物的合成(η-C 5 H ^ 5)2的Ti(OOCC 6 H ^ 4 X)2与它们的质量,一起报告1 H NMR,13 C NMR,中期和远红外光谱。该数据与通过苯环上的吸电子取代基X稳定了TiOOC键强度(比TiCp和TiHal的强度弱)的模型一致。X的电子影响也延伸到环戊二烯基环中。
Switchable Synthesis of Arylalkynes and Phthalides via Controllable Palladium-Catalyzed Alkynylation and Alkynylation–Annulation of Benzoic Acids with Bromoalkynes
palladium(II)-catalyzed synthesis of arylalkynes and phthalides from benzoicacids and bromoalkynes via carboxylate-assisted ortho-C–H activation is reported. A series of phthalides with various functional groups are prepared via ortho-alkynylation and alkynylation–annulation. Moreover, the key ortho-alkynylated products are also obtained by controlling the reaction conditions. In addition, heteroaryl acids could react
Synthesis of 1,2- and 1,3-Dicarboxylic Acids via Pd(II)-Catalyzed Carboxylation of Aryl and Vinyl C−H Bonds
作者:Ramesh Giri、Jin-Quan Yu
DOI:10.1021/ja8063827
日期:2008.10.29
A Pd(II)-catalyzed reaction protocol for the direct carboxylation of benzoic and phenylacetic acid derivatives to form dicarboxylic acids has been developed. The reaction conditions are also applicable for the carboxylation of vinyl C-Hbonds. The first C-H insertion Pd-aryl complex from carboxylic acids has been characterized by X-ray crystallography.
已经开发了用于苯甲酸和苯乙酸衍生物直接羧化以形成二羧酸的 Pd(II) 催化反应方案。反应条件也适用于乙烯基 CH 键的羧化。来自羧酸的第一个 CH 插入 Pd-芳基配合物已通过 X 射线晶体学表征。