Palladium- and Ruthenium-Catalyzed Cycloisomerization of Enynamides and Enynhydrazides: A Rapid Approach to Diverse Azacyclic Frameworks
作者:P. Ross Walker、Craig D. Campbell、Abid Suleman、Greg Carr、Edward A. Anderson
DOI:10.1002/anie.201304186
日期:2013.8.26
I want to ride my azacycle: The title reaction of enynamides affords a wide diversity of azacycles. The reactions are high‐yielding, highly stereoselective, and proceed rapidly under mild reaction conditions. Equivalent transformations using enynhydrazides offer new routes to pyrazole and indazole scaffolds. Boc=tert‐butoxycarbonyl, EWG=electron‐withdrawing group, Ns=4‐nitrobenzenesulfonyl, Ts=4‐toluenesulfonyl
我想骑着氮杂自行车:烯乙酰胺的标题反应提供了多种氮杂自行车。反应具有高产率,高立体选择性,并且在温和的反应条件下可以快速进行。使用烯丙肼的等效转化为吡唑和吲唑支架的开发提供了新途径。Boc =叔丁氧羰基,EWG =吸电子基团,Ns = 4-硝基苯磺酰基,Ts = 4-甲苯磺酰基。