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P. Ross Walker, Dr. Craig D. Campbell, Abid Suleman, Greg Carr and Dr. Edward A. Anderson Palladium- and Ruthenium-Catalyzed Cycloisomerization of Enynamides and Enynhydrazides: A Rapid Approach to Diverse Azacyclic Frameworks Angewandte Chemie International Edition 52

Article first published online: 15 JUL 2013 | DOI: 10.1002/anie.201304186

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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.

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