title: Facile synthesis of 2,5-diarylthiazoles via palladium-catalyzed tandem C-H substitutions. Design of tunable light emission and liquid crystalline characteristics.
abstract: A mild and regioselective C-H substitution reaction of thiazole by the catalysis of the palladium/copper system is found to proceed in the presence of tetrabutylammonium fluoride under mild conditions. Applying the new reaction, we synthesized various 2,5-diarylthiazoles that exhibit light-emitting and liquid crystalline characteristics in good yields. The color of light emission is tunable by the introduction of the substituent. Differently substituted 2,5-diarylthiazoles are found to exhibit a stable liquid crystal phase in a wide temperature range.
authors.affiliation: Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan. amori@res.titech.ac.jp
authors.forename: Atsunori
authors.initials: A
authors.lastname: Mori
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Sekiguchi
authors.forename: Kentaro
authors.initials: K
authors.lastname: Masui
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Shimada
authors.forename: Masaki
authors.initials: M
authors.lastname: Horie
authors.forename: Kohtaro
authors.initials: K
authors.lastname: Osakada
authors.forename: Masuki
authors.initials: M
authors.lastname: Kawamoto
authors.forename: Tomiki
authors.initials: T
authors.lastname: Ikeda