Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* p

Details Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* p Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* p

1989-07-12

1990-03-06

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

25229901, 25229961, 350350R, 350350S, 544242, 544315, 544335, G02F 113, C09K 1934, C07D23902

Patent

active

049067524

ABSTRACT:
Liquid-crystal 5-phenylpyrmidine derivatives having S.sub.c or S.sup.*.sub.c phases and a process for preparing them. The new liquid-crystal 5-phenylpyrimidine derivatives have an S.sub.c or S.sup.*.sub.c phase and are described by the general formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1 and R.sup.2 denote identical or different, straight-chain or branched alkyl or alkenyl groups having from k to 16 carbon atoms, with or without an asymmetric carbon atom, in which one or more non-adjacent --CH.sub.2 -- groups can be replaced by --O-- and /or --S----A and --B each denote ##STR2## in which the radicals R.sup.1, R.sup.2, in each case, are situated at the phenylene part of --A, --B and

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