2,2'-difluoro-4-alkoxy-4'-hydroxydiphenyls and their derivatives

Details 2,2'-difluoro-4-alkoxy-4'-hydroxydiphenyls and their derivatives 2,2'-difluoro-4-alkoxy-4'-hydroxydiphenyls and their derivatives

1987-02-26

1989-01-03

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 2522995, 25229963, 25229965, 25229966, 350350R, 350350S, 558270, 560 1, 560 73, 560108, 560114, 560116, 560118, 560126, 560141, G02F 113, C09K 1932, C09K 1930, C09K 1912, C07C 6974, C07C 6976

Patent

active

047955791

ABSTRACT:
The invention relates to novel compounds usable as liquid crystals in liquid crystal display devices utilizing the electrically controlled birefringence effect.
These compounds comply with formula: ##STR1## in which R.sup.1 represents an alkoxy or alkyl radical with 1 to 12 carbon atoms and Z represents a single bond or a radical chosen from among: ##STR2## provided that R.sup.1 represents an alkyl radical when Z represents a single bond and R.sup.2 represents an alkyl radical with 1 to 12 carbon atoms.
They can be obtained by reacting an acid chloride of formula R.sup.1 --z--COCL with a 2,2'-difluoro-4-alkoxy-4'-hydroxydiphenyl of formula: ##STR3##

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