OPTICALLY ACTIVE 1,2-DIMETHYLALKYL ESTER COMPOUND AND LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME

• Main Authors: OGINO KUMIKO, ISOZAKI TADAAKI, KUSUMOTO TETSUO, HIYAMA TAMEJIROU
• Format: Patent
• Language: English
• Published: 28.04.1997
• Edition: 6
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC CHEMISTRY; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To obtain the subject compound represented by a specific formula, exhibiting an antiferrodielectric property in a wide temperature range, and giving an antiferroelectric liquid crystal composition stabilized in the antiferroelectric property, when added to an antiferroelectric liquid crystal composition. SOLUTION: This compound of formula I [R is a (substituted) 1-18C alkyl; R is a 2-10C liner alkyl; W is a single bond,-O-,-COO-, etc.; X, Y, Z are each a single bond, -COO-, -C≡C-; the ring A, the ring B, the ring C, the ring D are each a (substituted) 1,4-phenylene, trans-1,4-cyclohexylene; m, n are each 1, 0; the * signal expresses an asymmetric carbon whose absolute configuration is R, S], e.g. (-)-(1R*, 2R*)-4-[4-(4-decyloxyphenyl)phenylcarboxy]benzoic acid 1,2-dimethylheptyl ester. The compound is obtained e.g. by reacting a carboxylic acid of formula II with an alcohol of formula III in the presence of a dehydration condensing agent such as ethyl polyphosphate, etc.