Oxidative desulfurization-fluorination - Facile synthesis of organofluorine compounds and development of fluorine-containing novel liquid-crystallinematerials

Citation
K. Kanie et al., Oxidative desulfurization-fluorination - Facile synthesis of organofluorine compounds and development of fluorine-containing novel liquid-crystallinematerials, NIP KAG KAI, (11), 2000, pp. 749-761
Citations number
105
Language
GIAPPONESE
art.tipo
Review
Categorie Soggetti
Chemistry
Journal title
NIPPON KAGAKU KAISHI
ISSN journal
0369-4577 → ACNP
Issue
11
Year of publication
2000
Pages
749 - 761
Database
ISI
SICI code
0369-4577(200011):11<749:OD-FSO>2.0.ZU;2-Z
Abstract
The oxidative desulfurization-fluorination reaction of organosulfur compoun ds using an N-halo imide and a fluoride source is demonstrated to be an eff ective and mild fluorination method that allows to synthesize various types of organofluorine compounds containing a difluoromethylene unit, tri fluor omethyl-substituted aromatics, trifluoromethyl ethers, and N-trifiuoromethy lamines in high yields with high chemoselectivity. Herein briefly summarize d are the synthetic procedures for such organofluorine compounds and scope and limitations of the reaction. The reaction is applied to the synthesis o f novel liquid-crystalline materials having a fluorine functional group suc h as an N-trifluoromethylamino, trifluoromethoxy, or 1,2-difluoroethylene g roup. The fluorine-containing liquid-crystalline materials are compared wit h the corresponding non-fluorinated materials in respect to phase transitio n behaviors and electro-optical properties. The novel fluorine-containing l iquid crystals are shown to be suitable for not only super twisted nematic (STN) but also thin film transistor (TFT) -addressed liquid crystal display s.