Generation of Aryl Radicals by the Oxidation of<i>α</i>-(Arylazo)triphenylmethanes by Cerium(IV) Ammonium Nitrate
作者:Noriyoshi Arai、Koichi Narasaka
DOI:10.1246/bcsj.68.1707
日期:1995.6
The one-electron oxidation of α-(arylazo)triphenylmethanes by cerium(IV) ammonium nitrate (CAN) generated aryl radicals along with the triphenylmethyl cation. When the reaction was carried out in the presence of appropriate radical-trapping agents, such as arenes and olefins, the corresponding addition products were obtained in moderate yield. The oxidation of the arylazo compounds with CAN was accelerated
硝酸铈(IV)铵(CAN)对α-(芳基偶氮)三苯基甲烷的单电子氧化产生芳基自由基和三苯基甲基阳离子。当反应在合适的自由基捕获剂如芳烃和烯烃存在下进行时,相应的加成产物以中等产率获得。通过添加酸加速芳基偶氮化合物与 CAN 的氧化。
Phosphine-Free Palladium(II)-Catalyzed Arylation of Naphthalene and Benzene with Aryl Iodides
作者:Chunxia Qin、Wenjun Lu
DOI:10.1021/jo801345b
日期:2008.9.19
A phosphine-free arylation of naphthalene and benzene with aryl iodides to give biaryls in moderate to good yields is carried out in the presence of catalytic Pd(OAc)2 and stoichiometric CF3CO2 Ag in TFE or/and TFA.
作者:Jinyi Song、Hongyan Zhao、Yang Liu、Huatao Han、Zhuofei Li、Wenyi Chu、Zhizhong Sun
DOI:10.1039/c6nj02815b
日期:——
synthesized using the Vilsmeier–Haack reaction and oximation. 2,5-Dihydroxyterephthalaldehyde dioxime (L8) as an efficient N,O-symmetrical bidentate ligand was prepared from hydroquinone. It was studied as a high activity ligand for palladium-catalyzed Suzuki–Miyaura cross-coupling reactions of arylchlorides with arylboronic acids under mild conditions. The couplingreactions were performed in the presence
使用Vilsmeier-Haack反应和肟化合成了一系列N,O-双齿配体。由对苯二酚制备作为有效的N,O-对称双齿配体的2,5-二羟基对苯甲醛二肟(L 8)。作为温和条件下芳基氯化物与芳基硼酸的钯催化的Suzuki-Miyaura交叉偶联反应的高活性配体,已对其进行了研究。偶联反应在PdCl 2作为催化剂,L 8作为配体,Na 2 CO 3存在下进行在85°C下,PEG-400作为PTC,在乙醇/水(1:1)中作为对环境无害的溶剂。通过优化的反应在0.20 mol%的低钯负载下以良好的收率获得了大量的联芳基。
Reactions of octahydroacridine-4-carbonitrile (carboxamide) with electrophilic reagents
作者:Ekaterina V. Zaliznaya、Oleg K. Farat、Nikolay Yu. Gorobets、Viktor I. Markov、Roman I. Zubatyuk、Aleksandr V. Mazepa、Elena V. Vashchenko
DOI:10.1007/s10593-015-1703-8
日期:2015.4
(carboxamide) was shown to react with aryldiazonium salts and other electrophilicreagents in acidic and neutral media. The reactions occurred at the methine carbon atom, forming the corresponding 4-functionalized derivatives. The obtained azo compounds decomposed at 140–155°С with elimination of nitrogen and gave products formed by the reactions of radical intermediates.