2026-04-17T14:49:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/38662021-11-10T09:38:24Zcom_10259_3593com_10259_5086com_10259_2604col_10259_3594

00925njm 22002777a 4500 dc García García, Patricia author Rashid, Muhammad A. author Sanjuán Cortázar, Ana María author Fernández Rodríguez, Manuel A. author Sanz Díez, Roberto author 2012-09 Dihydrobenzo[a]fluorene derivatives have been prepared by a formal intramolecular [3 + 3] cycloaddition of o-alkynylstyrenes bearing a secondary alkyl group at the β-position of the styrene moiety. The process, catalyzed by a cationic gold(I) complex, involves a 1,2-hydride migration as the key step. 6,11-Dihydro-5H-benzo[a]fluorenes could be obtained from the initially generated 6,6a-dihydro-5H-benzo[a]fluorenes by subsequent heating of the reaction mixture under gold(I) or Brønsted acid catalysis or directly by conducting the reactions at high temperature 1523-7060 http://hdl.handle.net/10259/3866 10.1021/ol3020682 Straightforward Synthesis of Dihydrobenzo[a]fluorenes through Au(I)-Catalyzed Formal [3 + 3] Cycloadditions