title: Formal [4 + 1] Cycloadditions of β,β-Diaryl-Substituted ortho-(Alkynyl)styrenes through Gold(I)-Catalyzed Cycloisomerization Reactions.
abstract: Gold(I)-catalyzed cycloisomerization of β,β-diaryl-o-(alkynyl)styrenes at 80 °C selectively yields dihydroindeno[2,1-a]indenes in a transformation that encompasses a formal [4 + 1] cycloaddition and takes place through a cascade 5-endo-cyclization-diene activation-iso-Nazarov cyclization. In addition, by performing the reaction at 0 °C, the same substrates exclusively give rise to benzofulvene derivatives, which have also been shown to be intermediates in the formation of the tetracyclics.
authors.affiliation: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001-Burgos, Spain.
authors.forename: Ana M
authors.initials: AM
authors.lastname: Sanjuán
authors.affiliation: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001-Burgos, Spain.
authors.forename: Cintia
authors.initials: C
authors.lastname: Virumbrales
authors.affiliation: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001-Burgos, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: García-García
authors.affiliation: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001-Burgos, Spain.
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Fernández-Rodríguez
authors.affiliation: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001-Burgos, Spain.
authors.forename: Roberto
authors.initials: R
authors.lastname: Sanz