Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio...

Details Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio... Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio...

C - Chemistry, Metallurgy

07

D

31/105, 260/251

C07D 405/12 (2006.01) C07D 409/12 (2006.01) C09K 19/34 (2006.01) C09K 19/58 (2006.01)

Patent

CA 1290755

Abstract of the Disclosure Chiral aryl-2,3-epoxyalkyl ethers or the corresponding thio compounds, and the use thereof as dopes in liquid- crystal phases The novel compounds are aryl-2,3-epoxyalkyl ethers or thioethers or the corresponding thiirane compounds having a mesogenic aromatic component and a chiral component having a three-membered heterocyclic ring, wherein, in the general formula (I), Image (I) the symbols have the following meaning: R1 = straight-chain or branched (C1-C12) alkyl, where one or two non-neighbouring CH2 groups may be replaced by O or S atoms, A = diazine-2,5-diyl or diazine-3,6-diyl, X and Y = O and/or S, and R2, R3 and R4, independently of one another = H, straight- chain (C1-C10)alkyl or branched (C3-C10)alkyl, where R2, R3 and R4 are not simultaneously H. The compounds are preferably employed in tilted smectic liquid-crystal phases which they convert into ferroelectric liquid-crystal phases; they have high values for spontaneous polarization or they induce high values for spontaneous polarization.

548549

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