Palladium-Catalyzed Dehydrogenative Cross-Couplings of Benzazoles with Azoles
作者:Wei Han、Peter Mayer、Armin R. Ofial
DOI:10.1002/anie.201006208
日期:2011.2.25
Different enough: Palladium‐catalyzed cross‐couplings of benzazoles with imidazoles, oxazoles, and thiazoles furnish unsymmetrical 2,2′‐bisheteroaryls in high yield (see scheme). These oxidative CC bond formations use the selective cleavage of the CH bond at C2 in the two coupling partners and are robust enough to be conducted under normal air atmosphere.
Copper-Catalyzed Dehydrogenative Cross-Coupling of Benzothiazoles with Thiazoles and Polyfluoroarene
作者:Shilu Fan、Zhao Chen、Xingang Zhang
DOI:10.1021/ol3023165
日期:2012.9.21
A copper-catalyzed dehydrogenative cross-coupling of benzothiazoles with thiazoles and polyfluoroarene under mild reaction conditions is described. This protocol provides a straightforward and operationally simple method for the synthesis of the 2,2'-linkage of thiazoles and 2-polyfluoroarylthiazoles of interest in life and material sciences.
Copper and cobalt co-catalyzed aerobic oxidative cross-dehydrogenative coupling reaction of (benzo)azoles
作者:Yanrong Li、Fen Qian、Xia Ge、Tao Liu、Hitesh B. Jalani、Hongjian Lu、Guigen Li
DOI:10.1039/c9gc02464f
日期:——
The dehydrogenativecross-coupling (CDC) reaction of diversely substituted azoles, synergistically catalyzed by copper and cobalt, is reported. This protocol represents the first example of the use of air as an oxidant to carry out this chemical reaction. The process provides a convenient and economical method for the construction of valuable unsymmetrical bis-heteroaryl compounds, including bis-benzoazole