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. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Walker, P. R., Campbell, C. D., Suleman, A., Carr, G., & Anderson, E. A. (2013). Palladium- and ruthenium-catalyzed cycloisomerization of enynamides and enynhydrazides: A rapid approach to diverse azacyclic frameworks. Angewandte Chemie - International Edition, 52(35), 9139–9143. https://doi.org/10.1002/anie.201304186