| abstract |
NEW MATERIAL:A compound shown by the formula I (R 1 is 1W18C alkyl; R 2 is alkyl containing ≥3C branched chain, or aralkyl; X is Cl or Br; * is optically active carbon atom; Ph is 4-phenylene). n EFFECT: (2S,3S)-3-Methyl-2-chloropentanoic acid-4'-(4"-octyloxyphenyl)-phenyl ester. n USE: A liquid crystal composition for color display of white color type, for display of cholesteric nematic phase transfer type, for preventing occurrence of reverse domain in TN type cell, for memory display element such as heat writing, laser writing, etc. n PREPARATION: For example, an optically active amino acid such such as valine, leucine, etc., is reacted with sodium nitrite in a halogenated hydrocarbon, to give a corresponding halocarboxylic acid, which is condensed through dehydration with a 4-(4'-alkoxyphenyl)phenol shown by the formula II, to give a compound shown by the formula I. n COPYRIGHT: (C)1986,JPO&Japio |