RT Journal Article T1 Catalytic Cyclization of o‐Alkynyl Phenethylamines via Osmacyclopropene Intermediates: Direct Access to Dopaminergic 3‐Benzazepines A1 Álvarez Pérez, Andrea A1 González Rodríguez, Carlos A1 García Yebra, Cristina A1 Varela Carrete, Jesús Ángel A1 Oñate Rodríguez, Enrique A1 Esteruelas Rodrigo, Miguel Ángel A1 Saá Rodríguez, Carlos K1 Benzazepines K1 Cyclization K1 Metallacyclopropenes K1 Osmium catalysts K1 Phenethylamines AB A novel osmium‐catalyzed cyclization of o‐alkynyl phenethylamines to give 3‐benzazepines is reported. The procedure allows the straightforward preparation of a broad range of dopaminergic 3‐benzazepine derivatives. Mechanistic investigations revealed that the process takes place via osmacyclopropene intermediates, which were isolated and characterized by X‐ray crystallography. PB Wiley SN 1433-7851 YR 2015 FD 2015 LK http://hdl.handle.net/10347/23347 UL http://hdl.handle.net/10347/23347 LA eng NO Álvarez-Pérez, A., González-Rodríguez, C., García-Yebra, C., Varela, J. A., Oñate, E., Esteruelas, M. A., Saá, C. (2015). Catalytic Cyclization of o‐Alkynyl Phenethylamines via Osmacyclopropene Intermediates: Direct Access to Dopaminergic 3‐Benzazepines. Angew. Chem. Int. Ed., 54, 45, 13357-13361 NO NOTICE: This is the peer reviewed version of the following article: Álvarez-Pérez, A., González-Rodríguez, C., García-Yebra, C., Varela, J. A., Oñate, E., Esteruelas, M. A., Saá, C. (2015). Catalytic Cyclization of o‐Alkynyl Phenethylamines via Osmacyclopropene Intermediates: Direct Access to Dopaminergic 3‐Benzazepines. Angew. Chem. Int. Ed., 54, 45, 13357-13361. [doi: 10.1002/anie.201505782]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for self-archiving NO This work was supported by MICINN (projects CTQ2011-28258, CTQ2014-52799-P, and CTQ2014-51912REDC), Xunta de Galicia and European Regional Development Fund (projects GRC2014/032 and EM 2012/051), the DGA (E-35) and the European Social Fund (SFE). A. A.-P. and C. G.-R. thank Spanish MICINN for a predoctoral FPI fellowship and Juan de la Cierva Contract (JCI-2011-09946), respectively DS Minerva RD 23 abr 2026