Synthesis of xanthones through the palladium-catalyzed carbonylation/C–H activation sequence
作者:Yingmeng Xu、Jing Zhou、Congcong Zhang、Ke Chen、Tao Zhang、Zhenting Du
DOI:10.1016/j.tetlet.2014.09.119
日期:2014.11
A series of xanthones with the dibenzo-γ-pyrone framework were synthesized through the palladium-catalyzed carbonylation/C–H activation sequence from the ortho diazonium salts of diaryl ethers in moderate to excellent yields. After screening the reaction condition, the optimal condition was 5 mol % tetrakis (triphenylphosphine) palladium (0) as the catalyst, potassium carbonate as the base, and toluene
一系列与二苯并-γ吡喃酮框架呫通过钯催化的羰基/ C-H活化从序列合成邻二芳基醚类的重氮盐在中度至良好的产率。筛选反应条件后,最佳条件是在一氧化碳气氛下,在催化量的四丁基溴化铵存在下,以5 mol%四(三苯基膦)钯(0)为催化剂,碳酸钾为碱,甲苯为溶剂。 。