Pd-catalyzed aerobic oxidative coupling of anilides with olefins was achieved through selective C–H bond activation. Compared to the previous studies, not only did we successfully use molecular oxygen to replace the chemical oxidant, but we also obtained improved yields for a number of substrates. The reaction tended to give high yields for electron-rich anilides and electron-deficient olefins, with
Alternative to Benzoquinone for Room-Temperature Fujiwara–Moritani Reactions
作者:Xinzhu Liu、King Kuok (Mimi) Hii
DOI:10.1021/jo201164m
日期:2011.10.7
perbenzoate is a substitute for benzoquinone for mild (room-temperature) Fujiwara–Moritani reactions between acetanilides and butyl acrylate under homogeneous conditions. The system was enhanced further by including Cu(OAc)2 as a cocatalyst. Methyl methacrylate can be activated toward coupling under these conditions.
The C-H activation of aryl amide using readily available Pd(OAc)(2) in the presence of selectfluor is reported. The highly mono-selective introduction of sp(2) hybridized functional groups have been realized. A broad range of aryl-, alkenyl- and keto-aryl amides were prepared using unactivated coupling partners under mild conditions. (C) 2018 Elsevier Ltd. All rights reserved.