Suzuki-Miyaura and Related Cross-Couplings in Aqueous Solvents Catalyzed by Di(2-pyridyl)methylamine-Palladium Dichloride Complexes
作者:Carmen Nájera、Juan Gil-Moltó、Sofia Karlström
DOI:10.1002/adsc.200404195
日期:2004.12
dichloride complexes 4 are versatile catalysts for different types of cross-coupling reactions in water or aqueous solvents under aerobic conditions. The Suzuki–Miyaura reaction of arylboronic acids can be performed with bromoarenes under water reflux using K2CO3 as base or at room temperature or 60 °C in aqueous methanol using KOH as base. For aryl chlorides the corresponding cross-couplings with arylboronic
基于二(2-吡啶基)甲胺的二氯化钯配合物4是通用的催化剂,用于在好氧条件下在水或水性溶剂中进行不同类型的交叉偶联反应。芳基硼酸的Suzuki-Miyaura反应可以与溴代芳烃在回流下,以K 2 CO 3为碱,或在室温或60°C的甲醇水溶液中,以KOH为碱,进行。对于芳基氯化物,相应的与芳基硼酸的交叉偶联可以在回流水中与K 2 CO 3进行。作为碱,以TBAB为添加剂,以提供联芳基和杂联芳基。芳基硼酸还在以K 2 CO 3为碱或在室温下在丙酮水溶液和KOH为碱的回流水中与苄基氯和烯丙基底物如氯化物,乙酸盐或碳酸盐反应,得到二芳基甲烷和芳基丙烯。三甲基环硼氧烷和烷基硼酸在水中与K 2 CO 3回流下与溴代和氯代芳烃偶联作为基础,TBAB作为添加剂,提供甲基和丁基芳烃。这些交叉耦合也已经在微波辐射下在较短的时间内完成了。几种重要的中间体,例如4'-甲基联苯-2-腈,4-联苯乙酸,3-(3-甲基苯基)苯甲酸,4