Mechanism of Azo Coupling Reactions: Part XXXVI. The Relationship between the Structure and the Catalytic Activity of Anionic Phase-Transfer Catalysts in Azo Coupling Reactions
作者:Hidetoshi Iwamoto、Hiroshi Kobayashi、Pius Murer、Takaaki Sonoda、Heinrich Zollinger
DOI:10.1246/bcsj.66.2590
日期:1993.9
dichloromethane/water system, and the effects of the solvent polarity and structure of counter anions on the reaction rates of the azo coupling of the diazonium ion 1 with N,N-dimethylaniline (4) and 1,3,5-trimethoxybenzene (2) in organic solvents and in dichloromethane/water system, were investigated. The symmetrical structure of the tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (TFPB) anion was proved
研究了一系列含有烷基、羟基或甲氧基的 15 种芳烃磺酸钠,用于 4-甲氧基苯重氮离子 (1) 与 1,3,5-三甲氧基苯 (2) 在二氯甲烷 /水两相系统,其中测量了产率、初始反应速率和重氮离子 1 分解的影响。抗衡阴离子对二氯甲烷/水体系中重氮离子1分配系数(α)的影响,以及抗衡阴离子的溶剂极性和结构对重氮离子1与重氮离子偶氮偶联反应速率的影响研究了有机溶剂和二氯甲烷/水体系中的 N,N-二甲基苯胺 (4) 和 1,3,5-三甲氧基苯 (2)。tetrakis 的对称结构[3, 5-双(三氟甲基)苯基]硼酸盐 (TFPB) 阴离子被证明是与 TFPB 离子配对的重氮离子 1 具有非常高的 α 的重要因素。松散的...