MeOTf-catalyzed formal [4 + 2] annulations of styrene oxides with alkynes leading to polysubstituted naphthalenes through sequential electrophilic cyclization/ring expansion
作者:Song Zou、Zeyu Zhang、Chao Chen、Chanjuan Xi
DOI:10.1016/j.cclet.2021.12.012
日期:2022.6
MeOTf-catalyzed formal [4 + 2] annulation of styrene oxides with alkynes to afford polysubstituted naphthalenes has been realized, which undergoes sequential electrophiliccyclization/ring expansion. A range of substrates were tolerated in the formation of naphthalene derivatives with high regioselectivity in satisfactory yields. The reaction could also be carried out on gram scale.
Synthesis of Naphthalene Derivatives via a Novel Gallium Trichloride Catalyzed Cross-Coupling of Epoxides with Alkynes
作者:Chao-Jun Li、Ganapathy S. Viswanathan
DOI:10.1055/s-2002-33530
日期:——
Gallium trichloride catalyzes the tandem ring opening of epoxides and cyclization with alkynes to generate naphthalene derivatives with complete regio control.
acetaldehydes with alkynes has been established, which provides a new and versatile straightforward procedure for the regioselective synthesis of mono-, di-, and polysubstituted naphthalenes under mild conditions. Interestingly, the present catalytic system not only differentiates between internal and terminal alkynes but also shows unprecedented complete Me3SiOH elimination selectivity for silyl alkyne substrates
Rhenium-catalyzed coupling reaction of alkynes with phenylacetaldehyde dimethylacetal in the presence of H2O regioselectively afforded the corresponding 1,2-disubstituted naphthalenes. (C) 2012 Elsevier Ltd. All rights reserved.
A Highly Regioselective Synthesis of Polysubstituted Naphthalene Derivatives through Gallium Trichloride Catalyzed Alkyne–Aldehyde Coupling This work has been partially supported by the US NSF CAREER Award program and the US NSF-EPA STAR program.
作者:Ganapathy S. Viswanathan、Mingwen Wang、Chao-Jun Li