Document Type and Number:
Japanese Patent JPS5137838
Kind Code:
B1
Abstract:
1285388 Liquid crystal compositions; dyes and pigments MERCK PATENT GmbH 2 Nov 1970 [28 March 1970] 52048/70 Heading C4P [Also in Division C2] The invention comprises compounds of the formula where X is an azo or azoxy group, R is a straight chain alkyl group with 1-8 carbon atoms and R1 is a straight chain alkyl or alkanoyl group with 1-10 carbon atoms. The compounds may be prepared (1) by etherifying or esterifying the corresponding phenol derivative, (2) by reacting together nitroso benzene and aniline derivatives, (3) by reacting a mixture of two aniline derivatives or a hydrazo derivative with an oxidizing agent, (4) by reducing a mixture of two nitrobenzene derivatives, (5) by diazotization and coupling, (6) by reacting a nitrosobenzene derivative with a phenylhydroxylamine derivative or (7) by oxidizing the azo compound to the azoxy compound. The compounds may be used in nematic compositions.
Application Number:
JP12684872A
Publication Date:
October 18, 1976
Filing Date:
December 19, 1972
Export Citation:
International Classes:
C07C67/00; C07C241/00; C07C245/08; C07C291/08; C09B43/06; H01B3/18; C09B43/28; C09K19/24; C09K19/26; G01R33/28; G02B1/06; G02F1/13; (IPC1-7): G09F9/00; G09F9/30; G02F1/13; C09K3/34