title: Synthesis of tetrasubstituted benzenes via rhodium(I)-catalysed ring-opening benzannulation of cyclobutenols with alkynes.
abstract: A formal [4 + 2] annulation occurs between 1,3-disubstituted cyclobutenols and internal alkynes in the presence of rhodium(I) catalysts to afford 1,2,3,5-tetrasubstituted benzenes. These benzannulation products are generated through dehydration of the initially formed cyclohexadienols.
authors.affiliation: Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan. mtd@rs.tus.ac.jp
authors.forename: Takanori
authors.initials: T
authors.lastname: Matsuda
authors.forename: Norio
authors.initials: N
authors.lastname: Miura