2026-06-17T23:17:55Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/49262021-11-10T09:38:25Zcom_10259_3593com_10259_5086com_10259_2604col_10259_3594

Suárez, Anisley Suarez Pantiga, Samuel Nieto Faza, Olalla . Sanz Díez, Roberto 2017-10 Gold(III)-catalyzed cycloisomerization of α-bis(indol-3-yl)methyl alkynols selectively affords 1-(indol-3-yl)carbazoles, in a transformation that takes place through a selective 1,2-alkyl vs 1,2-vinyl migration step in the vinyl-gold intermediate generated from the initial 5-endo-spirocyclization. The reaction proceeds well with either tertiary or secondary starting alkynols as well as with a wide variety of alkyne substituents. The key role of the other indol-3-yl substituent for the unexpected selectivity in the 1,2 rearrangement has also been supported by DFT calculations that reveal a low barrier, two-step mechanism in the alkyl migration path where the second indole significantly stabilizes a carbocationic intermediate. application/pdf http://hdl.handle.net/10259/4926 eng American Chemical Society Gold-Catalyzed Synthesis of 1-(Indol-3-yl)carbazoles: Selective 1,2-Alkyl vs 1,2-Vinyl Migration info:eu-repo/semantics/article TEXT RIUBU. Repositorio Institucional de la Universidad de Burgos Hispana