title: Thermal cyclization of nonconjugated aryl-yne-carbodiimide furnishing a dibenzonaphthyridine derivative.
abstract: The reagent-free C(2)-C(7) thermal cyclization of a nonconjugated aryl-yne-carbodiimide yielded a dibenzo[b,g][1,8]naphthyridine derivative, whose congeners are known to possess fascinating pharmacological properties. This is the first heteroaromatic compound prepared by the thermal cycloaromatization of "nonconjugated" aryl-ynes.
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan. hidenori-kimura@ds-pharma.co.jp
authors.forename: Hidenori
authors.initials: H
authors.lastname: Kimura
authors.forename: Kohei
authors.initials: K
authors.lastname: Torikai
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ueda