TETRALIN COMPOUND, ITS PRODUCTION AND TETRALIN-TYPE CARBOXYLIC ACID ESTER COMPOUND, LIQUID CRYSTAL MATERIAL, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL ELEMENT

摘要

PURPOSE: To provide a new tetralin compound capable of forming a liquid crystal element having a broad working temperature range, a high switching speed, an extremely low power consumption and a stable contrast. ;CONSTITUTION: This new tetralin carboxylic acid ester is expressed by formula I {R is a 3-20C alkyl or a 3-20C polyfluoroalkyl; X is COO, OCO, O or single bond; A¹ is 1,4-phenylene, 4,4'-biphenylene, a group of formula II, 2,6-naphthylene, etc.; Y¹ is COO, OCO, CH₂O or OCH₂; Z is group of formula III to formula VII, etc.; R* is Q¹-C*HQ²-Q³ [Q¹ is (CH₂)_a; (a) is 0-6; Q² is CF₃, CH₃ or C₂H₅; Q³ is a 1-10C alkyl or a 1-10C polyfluoroalkyl; Q² is different from Q³)]}. This new tetralin compound useful as an intermediate for the compound of formula I is expressed by formula VIII [R is H, a 1-20C alkyl, a 6-20C aryl or a 7-20C aralkyl; Z is group of formula III or formula IV; R' is H, a 1-20C alkyl, a 6-20C aryl or Q¹-C*HQ²-Q³ (Q¹ and Q³ are each same as the group defined in formula I; Q² is H, CF₃, CH₃ or C₂H₅)].;COPYRIGHT: (C)1996,JPO