TRIFLUOROMETHYLBENZENE DERIVATIVE AND LIQUID CRYSTAL COMPOSITION

Japanese Patent JP3702426

B2

PURPOSE: To obtain a new compound, useful as a composition component for a nematic liquid crystal display element or a ferroelectric liquid crystal display element and excellent in chemical stability.
CONSTITUTION: This compound is expressed by formula I [R1 is a 1-14C alkyl or alkoxyalkyl; R1 is a 1-14C alkyl; A is formula II, etc., (L1 and L2 are each H or F); Y is a single bond, 0, etc.; Z is a single bond or 0; X is H, F, etc.], e.g. 3-trifluoromethyl-3'-fluoro-4,4"-dioctyloxyterphenyl. The compound of formula I is obtained by lithiating a compound of formula III with C4H4Li, then reacting the resultant compound with B(OCH3)3, treating the prepared boric acid ester derivative with aqueous hydrogen peroxide, thereby providing a compound of formula IV and then etherifying or esterifying the compound of formula IV. Since the obtained compound has an especially great negative Δε, the composition is useful as a host material in a τ-Vmin mode method or a liquid crystal material such as a ferroelectric liquid crystal composition according to a high-frequency superposition method or an electrically controlled birefringence mode (ECB) type nematic liquid crystal composition.

Kazuhiko Tsuchiya
Kenji Suzuki
Kenji Kuroiwa

JP21166094A

October 05, 2005

August 03, 1994

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Kanto Chemical Co., Ltd.

G02F1/19; C07C22/08; C07C25/18; C07C43/174; C07C43/225; C07C69/63; C07C69/76; C07C69/94; C09K19/12; C09K19/30; C09K19/44; C09K19/46; (IPC1-7): C07C25/18; C07C43/174; C07C43/225; C07C69/63; C09K19/12; C09K19/30

DE4338348A1

社団法人日本化学会,液晶の化学,学会出版センター,1994年 4月25日,第40-43頁

Yuzo Yasuda

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