Process for preparing silacyclohexane-base liquid crystal compou

Details Process for preparing silacyclohexane-base liquid crystal compou Process for preparing silacyclohexane-base liquid crystal compou

1995-07-12

1996-05-07

Shaver, Paul F.

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

Organic compounds

Silicon containing

20415744, 20415745, 20415764, 20415774, C07F 708, C07F 718

Patent

active

055148247

ABSTRACT:
A process for preparing silacyclohexane-based liquid crystal compounds of the formula which comprises reacting ketone compounds of the following general formula ##STR1## Ar represents a phenyl or tolyl group, and R represents Ar, a substituted or unsubstituted alkyl group, with an organometal reagent such as a Grignard reagent or an organotitanium, organolithium or organozinc compound, followed by dehydration, oxidation, de-silylation and reduction to obtain silacyclohexane-based liquid crystal compounds of the type mentioned below. ##STR2## wherein Y is halogen and i is a value of 0, 1, 2 or 3, and A represents a substituted phenyl group or tolyl group or a halogen or functional group such as CN, Cl, Br, OCF.sub.3, OCHF.sub.2 etc.

REFERENCES:
patent: 4973723 (1990-11-01), Cawthorn et al.
patent: 5454977 (1995-10-01), Shimizu et al.

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