C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 239/32 (2006.01) C07C 69/92 (2006.01) C07D 213/65 (2006.01) C07D 237/14 (2006.01) C07D 239/26 (2006.01) C07D 239/34 (2006.01) C07D 239/38 (2006.01) C07D 241/18 (2006.01) C07D 285/12 (2006.01) C07D 405/12 (2006.01) C07F 1/08 (2006.01) C09K 19/20 (2006.01) C09K 19/34 (2006.01) G02F 1/13 (2006.01)
Patent
CA 2075198
- 32 - HOE 90/F 038 Abstract of the disclosure Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures Geminal dimethylalkyl compounds of the formula (I) Image (I) in which: R1 is, for example, straight-chain or branched (with or without an asymmetric carbon atom) alkyl or alkenyl having 2 to 16 carbon atoms, A1, A2 and A3 are, for example, identical or different 1,4-phenylene, 1,4-cyclohexylene or pyrimidine- 2,5-diyl, M1 and M2 are, for example, identical or different CO-O or O-CO, G is, for example, identical or different straight- chain or branched alkylene having 1 to 16 carbon atoms, k, 1, m and n are zero or 1, and R6 is straight-chain alkyl having 1 to 10 carbon atoms, can advantageously be employed in liquid-crystalline mixtures. In liquid-crystalline mixtures, said compounds result in a melting point depression, in a shift in the temperature limit of the Sc phase in ferroelectric mix- tures and in other improvements of important electro- optical characteristic values.
Harada Takamara
Illian Gerhard
Mueller Ingrid
Fetherstonhaugh & Co.
Harada Takamara
Hoechst Aktiengesellschaft
Illian Gerhard
Mueller Ingrid
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