| 摘要 |
NEW MATERIAL:The compound of formula I (R<1> is a substituent group having asymmetric carbon atom; R<2> is substituent group having asymmetric carbon atom, alkyl, alkoxy, aryl or aryloxy; R<3> and R<4> are 1-3C alkyl, 1-3C alkoxy, halogen, nitro, amino, 1-3C alkylamino or dialkylamino; m and n are 0-3). EXAMPLE:5-(S-2-methylbutyl)-5'-(4-pentylphenyl)thioindigo. USE:A material for liquid crystal display or optical recording. PREPARATION:The objective compound can be synthesized according to the reaction formula from an optically active benzene derivative of formula II having a substituent group containing asymmetric carbon atom.
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