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
AbstractThe selective activation/functionalization of benzhydryl C(sp3)H bonds is documented. The gold complex XPhosAuNTf2 turned out to be an efficient catalyst (5 mol%) to transform readily available propargylic esters into di‐ or trisubstituted naphthalenes in high yield. A 1,5‐hydride shift is postulated as the key step of the cascade reaction sequence.magnified image
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.