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Dr. Ke-Gong Ji, Jin Chen, Hai-Tao Zhu, Fang Yang, Ali Shaukat and Prof. Dr. Yong-Min Liang Brønsted Acid Catalyzed Cyclization of Hydroxylated Enynes: A Concise Synthesis of Five-Membered Heterocycles Chemistry - A European Journal 17

Version of Record online: 24 NOV 2010 | DOI: 10.1002/chem.201002222

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Falling into place: A mild and direct pathway for the formation of five-membered heterocyclic compounds from hydroxylated enynes has been developed (see scheme; Z=N,O, Ts=tosyl). This Brønsted acid catalyzed domino process involves the formation of an allene carbocation intermediate, which can be readily trapped by olefins to give various novel five-membered heterocyclic skeletons.

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