title: Selective synthesis of [2]- and [3]catenane tuned by ring size and concentration.
abstract: The syntheses of [2]- and [3]catenanes by olefin metathesis and oxidative acetylide coupling have been studied in detail. Pseudorotaxanes that were obtained by mixing crown ether and ammonium salts containing two terminal reactive end-groups were converted to [2]- and [3]catenane. Their yields were influenced not only by the chain length of the ammonium salts but also by the concentration of the crown ether and the ammonium salts. The strain energies of [2]catenane were responsible for the formation of [2]catenane.
authors: Graduate School of Science and Technology, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata 950-2181, Japan. iwamoto@chem.sc.niigata-u.ac.jp
authors: Hajime
authors: H
authors: Iwamoto
authors: Wataru
authors: W
authors: Takizawa
authors: Koji
authors: K
authors: Itoh
authors: Tatsuya
authors: T
authors: Hagiwara
authors: Eiji
authors: E
authors: Tayama
authors: Eietsu
authors: E
authors: Hasegawa
authors: Takeharu
authors: T
authors: Haino
mesh_terms: D043863:Catenanes / Q000138:chemical synthesis* / Q000737:chemistry; D008968:Molecular Conformation; D010316:Particle Size
chemical_list: D043863:Catenanes