| 摘要 |
The present invention relates to compounds of the formula <IMAGE> (8) in which Z is a halogen atom, a cyano group or a hydroxyl group, n is 0, 1 or 2, R' is a radical of the formula R'''-[Si(R*)2]x(CH2)yR''''-(9), in which x is the number 0 or 1, y is an integer from 1 to 18, R'''is a defined in the description, R* is identical or different, optionally substituted C1- to C18-hydrocarbon or hydrocarbonoxy radicals, R'''' is a phenylene or biphenylene radical or a radical of the formula -E-, where E is a divalent radical of the formula -O- or -[Si(R*)2]z-, and z is the number 0 or 1, and the compounds contain at least one group of the formula -Si(R*)2- per molecule, and the radical R'' is a cholesteryl radical, a radical as defined for R* or a radical of the formula -C6H4-R*, and the preparation and use thereof.
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