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Title:
LIQUID-CRYSTALLINE COMPOUND HAVING ALKYNYL GROUP AS SIDE CHAIN, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT
Document Type and Number:
Japanese Patent JPH10175888
Kind Code:
A
Abstract:

To obtain a new chemically extremely stable liquid-crystalline compound having a remarkably large Δn, good in compatibility with other liquid- crystalline compounds, and capable of being suitably used for liquid crystal compositions for STN, etc.

A compound of formula I [R1 is a halogen, cyano, a 1-5C alkyl; rings A1-A4 are each (halogenated) 1,4-cyclohexylene, 1,4-phenylene, 1,3- dioxan-2,5-diyl, etc.; Z1-Z3 are each a conjugated bond, CH2CH2, CH=CH, C≡C, etc.; R2 is H, a 1-10C alkyl; (s), (t) are each 0, 1; (u) is 1-5]. For example, 4'-(2- propenyl)-3-fluoro-4-(3-pentyn-1-yl)biphenyl. The compound of formula I is obtained by converting either of an iodo compound of formula II or a 4-alkynyl- iodobenzene of formula III into a Grignard reagent or Lithium reagent and subsequently cross-coupling the Grignard reagent or lithium reagent to the other compound.


Inventors:
MIYAZAWA KAZUTOSHI
MATSUI SHUICHI
TAKEUCHI HIROYUKI
KUBO YASUHIRO
TAKESHITA FUSAYUKI
NAKAGAWA ETSUO
Application Number:
JP18314497A
Publication Date:
June 30, 1998
Filing Date:
June 24, 1997
Export Citation:
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Assignee:
CHISSO CORP
International Classes:
C07C13/28; C07C15/50; C07C17/26; C07C22/00; C07C22/04; C07C22/08; C07C23/18; C07C25/18; C07C25/24; C07C43/168; C07C43/176; C07C43/188; C07C43/225; C07C69/75; C07C69/753; C07C69/76; C07C69/773; C07C69/84; C07C255/32; C07C255/35; C07C255/46; C07C255/50; C07D213/16; C07D213/61; C07D239/26; C07D319/06; C09K19/04; C09K19/08; C09K19/12; C09K19/14; C09K19/16; G02F1/13; C09K19/18; C09K19/20; C09K19/30; C09K19/34; C09K19/42; C09K19/44; C09K19/46; (IPC1-7): C07C13/28; C07C15/50; C07C22/00; C07C22/04; C07C22/08; C07C23/18; C07C25/18; C07C25/24; C07C43/168; C07C43/188; C07C43/225; C07C69/75; C07C69/753; C07C69/76; C07C69/773; C07C69/84; C07C255/32; C07C255/35; C07C255/46; C07C255/50; C07D213/16; C07D213/61; C07D239/26; C07D319/06; C09K19/08; C09K19/14; C09K19/16; C09K19/18; C09K19/20; C09K19/34; G02F1/13
Attorney, Agent or Firm:
Katsuhiko Nonaka