Pd-catalyzed divergent trifluoroethylation and arylation of arylboronic acids by aryl(2,2,2-trifluoroethyl)iodonium triflates
作者:Jing Yang、Qiu-Yan Han、Cheng-Long Zhao、Tao Dong、Zhi-Yuan Hou、Hua-Li Qin、Cheng-Pan Zhang
DOI:10.1039/c6ob01384h
日期:——
Highly electrophilic aryl(2,2,2-trifluoroethyl)iodonium triflates have been used for the first time as trifluoroethyl and aryl transfer reagents in Pd-catalyzed functionalization of arylboronic acids. Electron-rich arylboronic acids reacted with aryl(2,2,2-trifluoroethyl)iodonium triflates (2a–b) in CH3CN in the presence of Pd2(dba)3 and K3PO4 at room temperature to provide trifluoroethyl arenes in
高亲电性芳基(2,2,2-三氟乙基)碘鎓三氟甲磺酸酯首次在钯催化的芳基硼酸官能化中用作三氟乙基和芳基转移试剂。富电子芳基硼酸在室温下,在Pd 2(dba)3和K 3 PO 4存在下,在CH 3 CN中与芳基(2,2,2-三氟乙基)碘鎓三氟甲磺酸酯(2a–b)反应,以提供三氟乙基芳烃在Pd [P(t- Bu)3 ] 2和Cs 2 CO存在下,富电子的和贫电子的芳基硼酸与2a–b在DMF中的反应可达82%3在40°C下提供的芳基化产物收率高达99%。该可调协议允许在温和的条件下以高至极好的收率获得三氟乙基芳烃或联芳基,而无需添加额外的配体。