Copper(II)-Catalyzed Dehydrogenative Cross-Coupling between Two Azoles
作者:Xurong Qin、Boya Feng、Jiaxing Dong、Xiaoyu Li、Ying Xue、Jingbo Lan、Jingsong You
DOI:10.1021/jo301128y
日期:2012.9.7
The copper(II)-catalyzed dehydrogenative coupling between two different azoles for the preparation of unsymmetrical biazoles has been developed. The current catalytic system can effectively control the chemoselectivity for heterocoupling over homocoupling.
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.