作者:Hendrich A. Chiong、Quynh-Nhu Pham、Olafs Daugulis
DOI:10.1021/ja071845e
日期:2007.8.1
of free benzoic acids have been developed. The first method employs stoichiometric silver acetate for iodide removal, aryl iodide as the coupling partner, and acetic acid solvent. This method is applicable to the arylation of electron-rich to moderately electron-poor benzoic acids and tolerates chloride and bromide substituents on both coupling partners. The second method involves the use of aryl chloride
已经开发了两种新的钯催化方法,用于游离苯甲酸的直接邻位芳基化。第一种方法使用化学计量的乙酸银去除碘化物,芳基碘化物作为偶联伙伴,以及乙酸溶剂。该方法适用于富电子到中度缺电子苯甲酸的芳基化,并且在两个偶联伙伴上都可以耐受氯化物和溴化物取代基。第二种方法涉及使用芳基氯、碳酸铯碱、正丁基-二-1-金刚烷基膦配体和 DMF 溶剂,适用于富电子和缺电子苯甲酸。第二种方法的机理研究表明异裂 CH 键裂解是速率决定步骤。