title: Effective cation-assisted chirality induction using a dibenzo-diaza-30-crown-10 with bis(zinc(II) porphyrin) units.
abstract: The first rationalized crown ether-bis(porphyrin) conjugate with a large ring-based conformation flexibility 1 has been synthesized; the achiral-to-chiral transformation upon complexation with chiral diamines is assisted by K(+) accommodated in the crowned moiety, and it is possible to determine the chirality of carboxylates as potassium salts.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan. yuji@apc.saitama-u.ac.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kubo
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Ishii
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Yoshizawa
authors.forename: Sumio
authors.initials: S
authors.lastname: Tokita