Palladium-Catalysed Intramolecular Direct Arylation of 2-Bromobenzenesulfonic Acid Derivatives
作者:Charles Beromeo Bheeter、Jitendra K. Bera、Henri Doucet
DOI:10.1002/adsc.201200793
日期:2012.12.14
arylation of 2-bromobenzenesulfonic acid derivatives was found to proceed using 1 mol% of palladium acetate as the catalyst. The influence of the substituents on the phenol moiety of 2-bromobenzenesulfonic acid phenyl esters reveals that electron-donating substituents favour the reaction while electron-withdrawing ones are unfavourable. The reactivity of sulfonamides was also studied and, in all cases
发现使用1mol%乙酸钯作为催化剂进行2-溴苯磺酸衍生物的钯催化的分子内直接芳基化。取代基对2-溴苯磺酸苯基酯的酚部分的影响表明,供电子取代基有利于反应,而吸电子取代基不利。还研究了磺酰胺的反应性,并且在所有情况下,均观察到sp 2 CH与sp 3 CH的选择性活化。在氮上同时带有苯基和苄基取代基的磺酰胺选择性地产生六元环产物。