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–Hactivation 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
Unsubstituted, mono-, di- or trisubstituted-11-(1,2,3,6-tetrahydro-substituted-4-pyridyl)-dibenz[b,f][1 ,4]oxazepines, useful as anti-psychotic agents..