Silacyclohexane compounds, a liquid crystal composition comprisi

Details Silacyclohexane compounds, a liquid crystal composition comprisi Silacyclohexane compounds, a liquid crystal composition comprisi

1995-10-20

1997-04-29

Kelly, Cynthia Harris

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

556406, C09K 1934, C09K 1930, C07F 708

Patent

active

056246013

ABSTRACT:
A silacyclohexane compound of the following formula (I) ##STR1## wherein R represents an organic residue; ##STR2## represents a trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group having a substituent of H, F, Cl or CH.sub.3 ; L.sub.1 represents F, L.sub.2 and L.sub.3 independently represent H, F, Cl or CH.sub.3 ; X represents an organic residue, F or Cl; and n is an integer of 0, 1, or 2 and a and b are, respectively, 0 or 1 provided that a+b=1. Silacyclohexane compounds are useful in liquid crystal compositions and also in liquid crystal devices.

REFERENCES:
patent: 4496501 (1985-01-01), Shimizu et al.
patent: 5454977 (1995-10-01), Shimizu et al.
patent: 5498737 (1996-03-01), Ogihara et al.
"Acetolysis of 4,4-Disubstituted 4-Silacyclohexyl Tosylates: Effect of Remote Silicon Substitution on Organic Reactivity" by Stephen S. Washburne et al; Journal of Organometallic Chemistry, 133 (1977) pp., 7-17.
"Preparation and Spectral Properties of .beta.-Silyl-Substituted .alpha.,.beta.-Unsaturated Ketones" by Raymond A. Felix et al; J. Org. Chem., vol. 37, No. 14, 1972; pp., 2323-2327.
"Oxidations in Organic Chemistry" by Milos Hudlicky; pp. 106, 107, 130, 131, 176-181.
"Protective Groups in Organic Synthesis" by Theodora W. Greene; John Wiley & Sons, Inc., 1981; pp. 12-151.

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