title: Highly efficient synthesis of [3]- and [5]-rotaxanes consisting of crown ether and a sec-ammonium salt.
abstract: [3]- and [5]-rotaxanes consisting of crown ether and ammonium salts were synthesized in high yields by a tributylphosphine-catalyzed end-capping method which provides a simple and practical means of obtaining higher-order rotaxanes.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Sakai, Osaka 599-8531, Japan.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Watanabe
authors.forename: Takaya
authors.initials: T
authors.lastname: Yagi
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Kihara
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Takata