RT Journal Article T1 Vinyl Dihydropyrans and Dihydrooxazines: Cyclizations of Catalytic Ruthenium Carbenes Derived from Alkynals and Alkynones A1 Cambeiro Cambeiro, Fermín A1 López Estévez, Susana A1 Varela Carrete, Jesús Ángel A1 Saá Rodríguez, Carlos K1 Alkynes K1 Carbenes K1 Cyclization K1 Heterocycles K1 Ruthenium AB A novel synthesis of 2‐vinyldihydropyrans and dihydro‐1,4‐oxazines (morpholine derivatives) from alkynals and alkynones has been developed. The cyclizations require a mild generation of catalytic ruthenium carbenes from terminal alkynes and (trimethylsilyl)diazomethane followed by trapping with carbonyl nucleophiles. Mechanistic aspects of the new cyclizations are discussed. PB Wiley SN 1433-7851 YR 2014 FD 2014 LK http://hdl.handle.net/10347/23343 UL http://hdl.handle.net/10347/23343 LA eng NO Cambeiro, F., López, S., Varela, J. A., Saá, C. (2014). Vinyl Dihydropyrans and Dihydrooxazines: Cyclizations of Catalytic Ruthenium Carbenes Derived from Alkynals and Alkynones. Angew. Chem. Int. Ed., 53, 23, 5959-5963 NO NOTICE: This is the peer reviewed version of the following article: Cambeiro, F., López, S., Varela, J. A., Saá, C. (2014). Vinyl Dihydropyrans and Dihydrooxazines: Cyclizations of Catalytic Ruthenium Carbenes Derived from Alkynals and Alkynones. Angew. Chem. Int. Ed., 53, 23, 5959-5963. [doi: 10.1002/anie.201400675]. 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 (Spain) [projects CTQ2011-28258, Consolider Ingenio 2010 (CSD2007-0006)] and Xunta de Galicia and the European Regional Development Fund (project CN2011/054 and EM 2012/051). F.C. thanks XUGA for a predoctoral contract DS Minerva RD 27 abr 2026