Stereoselective Direct Copper-Catalyzed Alkenylation of Oxazoles with Bromoalkenes
作者:François Besselièvre、Sandrine Piguel、Florence Mahuteau-Betzer、David S. Grierson
DOI:10.1021/ol801512q
日期:2008.9.18
A copper-catalyzeddirectalkenylation of oxazoles with bromoalkenes has been developed. The method is both regio- and stereoselective and tolerates a variety of functional groups. A wide range of 2-E-vinyl-substituted oxazoles were obtained in high yields including the highly fluorescent alkaloid annuloline.
Copper as a Powerful Catalyst in the Direct Alkynylation of Azoles
作者:François Besselièvre、Sandrine Piguel
DOI:10.1002/anie.200904776
日期:2009.12.7
Copper‐bottomed catalysis! The direct alkynylation of azolesthrough a copper‐based CH bond activation, using alkynylbromides as the coupling partner, has been developed (see scheme). The method is very rapid, is functional‐group tolerant, and provides a straightforward entry to diverse alkynyl heterocycles that is complementary to the Sonogashira reaction.
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(II)-Catalyzed Oxidative CH/CH Cross-Coupling between Two Structurally Similar Azoles
作者:Jiaxing Dong、Yumin Huang、Xurong Qin、Yangyang Cheng、Jing Hao、Danyang Wan、Wei Li、Xingyan Liu、Jingsong You
DOI:10.1002/chem.201103813
日期:2012.5.14
Power of two: A widely functional‐group tolerant, selective and rapid oxidative cross‐coupling betweentwostructurallysimilarazoles has been carried out by using a palladium/copper co‐catalytic twofold CH activation method (see scheme).