A Highly Efficient Pd(PPh<sub>3</sub>)<sub>4</sub>-Catalyzed Suzuki Cross-Coupling Method for the Preparation of 2-Nitrobiphenyls from 1-Chloro-2-nitrobenzenes and Phenylboronic Acids
作者:Vijayaragavan Elumalai、Alexander H. Sandtorv、Hans-René Bjørsvik
DOI:10.1002/ejoc.201501487
日期:2016.3
A simple and efficient method for Suzuki cross-coupling of highly substituted and congested 1-chloro-2-nitrobenzene with phenylboronic acid was developed, investigated, and optimized. The reaction conditions comprises a mixture of MeOH and water (4:1) as the reaction medium, readily available and cheap Pd(PPh3)4 as catalyst, sodium carbonate as base, and microwave heating, which affords a fast reaction
开发、研究和优化了一种简单有效的方法,用于高度取代和拥挤的 1-氯-2-硝基苯与苯基硼酸的 Suzuki 交叉偶联。反应条件为甲醇和水(4:1)的混合物为反应介质,易得且廉价的Pd(PPh3)4为催化剂,碳酸钠为碱,微波加热,反应速度快,效果好。 . 该方法被证明对苯基硼酸和1-氯-2-硝基苯具有高官能团耐受性,因此是合成2-硝基联苯的通用方法。目标支架 2-硝基联苯在所有情况下都以极好的收率和极好的选择性生产。