Liquid crystalline ferroelectric derivatives of branched...

Details Liquid crystalline ferroelectric derivatives of branched... Liquid crystalline ferroelectric derivatives of branched...

C - Chemistry, Metallurgy

07

C

31/105, 260/154,

C07C 69/76 (2006.01) C07D 239/26 (2006.01) C07D 319/06 (2006.01) C09K 19/20 (2006.01) C09K 19/30 (2006.01) C09K 19/34 (2006.01)

Patent

CA 1280110

LIQUID CRYSTALLINE FERROELECTRIC DERIVATIVES OF BRANCHED ACYCLIC ALPHA-CHLOROCARBOXYLIC ACIDS ABSTRACT OF THE DISCLOSURE The invention relates to novel Liquid crystalline ferroelectric derivatives of branched acyclic alpha-chlorocarboxylic acids of the general formula I Image n = 0 or 1; m z 0 or 1; o = 0 or 1; p = 0 or 1 X = -COO-, -OOC-, or CH2-CH2- Y = X, -CH2-, -N=N, or -N=N(0)-, Image R1 = (CH3)2CH-, (CH3)2CH-CH2-, or C2H5-CH(CH3)- R2 = C?H2?+1' -O-C?H2?+1' -S-C?H2+1' -CO-C?H2?+1' -OOC-C?H2?+1' -COO-C?H2 +1' or -NH-C?H2?+1 ? = 1 - 12 It was discovered that by reacting chiral alpha- chlorocarboxylic acids or alpha-chlorocarboxylic acid chlorides or bromides, synthesized from natural alpha-amino acids by reaction with nitric and hydrochloric acids, with appropriate hydroxy compounds directly or in the presence of strongly dehydrating substances, preferably carbodiimides, liquid crystalline ferroelectric substances of the general formula I are formed. The inventive substances, by themselves, in mixtures with one another as well as with other liquid crystalline substances or substances which are not liquid crystalline, can form liquid crystalline ferroelectric phases, which make them suitable for use in displays.

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