title: Electrophilic cyclizations of diaryl-2,3-allenyl ethers with N-bromosuccinimide: en route to 2-bromonaphthalenes.
abstract: The reaction of diaryl-2,3-allenyl ethers with N-bromosuccinimide in a mixed solvent of CH3NO2/EtOH affords highly functionalized 2-bromonaphthalenes in 21-66% yields. The electronic effect on the aryl is important to the selectivity of the reaction: when 4-(trifluoromethyl)phenyl or 1-naphthyl was applied as one of the two aryl groups, the regioselectivity was practical, affording the products with the other relatively electron-rich phenyl ring or the non-1-naphthyl group being cyclized as the major, respectively.
authors.affiliation: Laboratory of Molecular Recognition and Synthesis, Department of Chemistry, Zhejiang University , Hangzhou 310027, Zhejiang, People's Republic of China.
authors.forename: Minyan
authors.initials: M
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Chunling
authors.initials: C
authors.lastname: Fu
authors.forename: Shengming
authors.initials: S
authors.lastname: Ma