title: Site-selective monotitanation of dialkynylpyridines and its application for preparation of highly fluorescent pi-conjugated oligomers.
abstract: Reaction of Ti(O-i-Pr)(4)/2i-PrMgCl reagent with 2,n-bis[(trimethylsilyl)ethynyl]pyridines, where n is 3, 4, 5, and 6, or with 3,4-bis[(trimethylsilyl)ethynyl]pyridines, proceeded with excellent site-selectivity to afford the corresponding monotitanated complex. Synthetic application of the reaction was demonstrated by an efficient preparation of pi-conjugated oligomers having pyridine and enyne units alternately, which possess intense blue fluorescence emission.
authors.affiliation: Department of Biomolecular Engineering, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8501, Japan.
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Takayama
authors.forename: Takeshi
authors.initials: T
authors.lastname: Hanazawa
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Andou
authors.forename: Kenji
authors.initials: K
authors.lastname: Muraoka
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ohtani
authors.forename: Mizuki
authors.initials: M
authors.lastname: Takahashi
authors.forename: Fumie
authors.initials: F
authors.lastname: Sato