title: Cycloadditions of 1-substituted 1,3-butadienes with 4- or 3-substituted 2(1H)-quinolones acting as dienophiles.
abstract: Cycloadditions of 1,3-butadiene derivatives having an electron-rich group at the 1-position with 4- or 3-substituted 2(1H)-quinolones were carried out to give the richly functionalized phenanthridines under both atmospheric and high pressure conditions. Furthermore, the reactivity of 4- or 3-substituted 2(1H)-quinolones acting as a dienophile with 1-substituted dienes was examined using MO calculation.
authors.affiliation: Tohoku Pharmaceutical University, Sendai, Japan. refujita@tohoku-pharm.ac.jp
authors.forename: Reiko
authors.initials: R
authors.lastname: Fujita
authors.forename: Kanako
authors.initials: K
authors.lastname: Oikawa
authors.forename: Toshiteru
authors.initials: T
authors.lastname: Yoshisuji
authors.forename: Yuko
authors.initials: Y
authors.lastname: Okuyama
authors.forename: Hiroto
authors.initials: H
authors.lastname: Nakano
authors.forename: Hisao
authors.initials: H
authors.lastname: Matsuzaki
mesh_terms: D002070:Butadienes / Q000737:chemistry* / Q000378:metabolism; D003500:Cyclization; D008968:Molecular Conformation; D015363:Quinolones / Q000737:chemistry* / Q000378:metabolism
chemical_list: D002070:Butadienes; D015363:Quinolones; C031763:1,3-butadiene