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Luz Escalante, Dr. Carlos González-Rodríguez, Dr. Jesús A. Varela and Prof. Carlos Saá Tandem Brønsted Acid Promoted and Nazarov Carbocyclizations of Enyne Acetals to Hydroazulenones Angewandte Chemie International Edition 51

Version of Record online: 4 NOV 2012 | DOI: 10.1002/anie.201205823

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Ring the changes: Enyne acetals were easily converted into hydroazulene skeletons by a new and efficient metal-free route involving a Brønsted acid promoted carbocyclization and a subsequent stereospecific Nazarov cyclization (see scheme). The versatility of this transformation also allowed assembly of interesting heteroaromatic tricyclic systems.

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