[EN] HALOGENATED S-(PERFLUOROALKYL) DIBENZOTHIOPHENIUM SALT AND ITS PRODUCTION METHODS<br/>[FR] SEL DE DIBENZOTHIOPHÉNIUM S-(PERFLUOROALKYL) HALOGÉNÉ ET SES PROCÉDÉS DE PRODUCTION
申请人:ZHEJIANG JIUZHOU PHARM CO LTD
公开号:WO2016107578A1
公开(公告)日:2016-07-07
Halogenated S-(perfluoroalkyl) dibenzothiophenium salt represented by the following general formula (I). This compound is a new, reactive, and industrially useful reagent for perfluoroalkylating organic compounds. The reagent can be prepared by a one-pot process or a two-step reaction process from a halogenated biphenyl and easily isolated by a filtration method. In addition, the halogenated biphenyl can be recovered by desulfurization from a halogenated dibenzothiophene obtained as a side-product by the usage of the reagent.
Regioselective reaction of fluorinated aryllithium reagents and carbon disulfide in cyclopentyl methyl ether: Efficient synthesis of dithioesters and liquid crystal compounds having a difluoromethyleneoxy moiety
Regioselective reaction (carbophilic over thiophilic attack) of several (o-fluorophenyl)lithium reagents with carbon disulfide was achieved to furnish dithioesters in good yields after alkylation, which are useful precursors of liquid crystal compounds having a difluoromethyleneoxy (-CF2O-) group. Running the reaction in the presence of a copper(I) salt catalyst and cyclopentyl methyl ether as a solvent
FOUR-RING LIQUID CRYSTAL COMPOUND HAVING TETRAHYDROPYRAN AND 2,2',3,3'-TETRAFLUOROBIPHENYL, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:Hirata Kenji
公开号:US20110297881A1
公开(公告)日:2011-12-08
The invention provides a liquid crystal compound that has a large negative dielectric anisotropy (Δ∈) and also has at least one of characteristics such as the stability to heat, light or the like, a high clearing point, a suitable refractive index anisotropy (Δn), a large negative dielectric anisotropy (Δ∈) and an excellent compatibility with other liquid crystal compounds. An excellent effect in which especially the value of the dielectric anisotropy (Δ∈) is increased negatively is achieved by use of the compound having two moieties of
1) a tetrahydropyran ring and
and thus the effect is utilized.
Synthesis and properties of novel fluorinated cycloparaphenylenes (FCPPs), F16[8]CPP and F12[6]CPP, were reported. Furthermore, the derivatization of F16[8]CPP afforded a new carbon nanoring where sixteen pyrroles are densely substituted.
Flüssigkristallmedium und dieses enthaltende elektrooptische Anzeige
申请人:Merck Patent GmbH
公开号:EP2251397A2
公开(公告)日:2010-11-17
Die vorliegende Erfindung betrifft nematische Flüssigkristallmedien, die a) eine dielektrisch negative, flüssigknstalline Komponente A enthaltend eine oder mehrere Verbindungen der Formel I
worin die Parameter die im Text angegebene Bedeutung haben, und b) eine weitere dielektrisch negative, flüssigkristalline Komponente B und wobei die Medien eine oder mehrere dielektrisch negative Verbindungen ausgewählt aus der Gruppe der Verbindungen der Formeln I-1 a und I-1a-i bis I-1a-iii
worin die Parameter die im Text angegebene Bedeutung haben,
sowie die Verwendung dieser Medien in Flüssigkristallanzeigen und Flüssigkristall-anzeigen die diese Medien verwenden, insbesondere ECB-und IPS-Anzeigen.
本发明涉及向列液晶介质,包括 a) 含有一种或多种式 I 化合物的介电负性液晶成分 A; b) 含有一种或多种式 I 化合物的介电负性液晶成分 C; c) 含有一种或多种式 I 化合物的介电负性液晶成分 D。
b) 另一种介电负性液晶组分 B,其中介质含有一种或多种介电负性化合物,这些化合物选 自式 I-1a 和 I-1a-i 至 I-1a-iii 所列化合物组成的组。
其中的参数具有文中给出的含义、
以及这些介质在液晶显示器和使用这些介质的液晶显示器(尤其是 ECB 和 IPS 显示器)中的应用。