OPTICALLY ACTIVE 2-ALKYLCYCLOALKYL ESTER COMPOUND

• 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; HETEROCYCLIC COMPOUNDS; 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 new compound capable of exhibiting stable antiferroelectricity and useful for liquid crystal display elements suitable for applying to optical shutters, printer heads, etc. SOLUTION: The compound of formula I [R is a (substituted) 1-18C alkyl; R is a linear 1-10C alkyl; W is a single bond, -O-, -COO-, -OCOO-, -OCOO-, X, Y, Z are each a single bond, -COO-,-C≡C-; ring A, ring B, ring C and ring D are each 1,4-phenylene, trans-1,4-cyclohexylene, pyrimidine-2,5-diyl, etc., which may be substituted with two fluorine atoms; m, n are each 0, 1; k is 0-4; *exhibits an asymmetric carbon]. For example, (-)-(1S*, 2S*)-4-[4-(4- decyloxyphenyl)phenylcarboxy]benzoic acid 2-pentylcyclopentyl ester. The compound of formula I is obtained by subjecting a compound of formula II and a compound of formula III to a mutual dehydrative condensation reaction.