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PROBLEM TO BE SOLVED: To provide a difluorobenzyl halide derivative useful as a production intermediate for chemicals etc., such as pharmaceuticals, agrochemicals and liquid crystal materials, and a method for efficiently producing the difluorobenzyl halide derivative.SOLUTION: There is provided a compound expressed by general formula (I) (in the formula, Ris a hydrogen atom, chlorine atom, bromine atom, iodine atom or 1-15C alkyl; A, Aand Aare each independently trans-1,4-cyclohexylene wherein one or more ring-constituting methylene groups may be substituted with an oxygen atom or sulfur atom, or 1,4-phenylene wherein one or more hydrogen atoms on a ring may be substituted with a fluorine atom; Z, Zand Zare each independently a single bond, -CHCH-, -(CH)-, -CHO- or -OCH-; l, m and n are each independently 0 or 1; and Xis a chlorine atom, bromine atom or iodine atom).
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Paragraph 0052; 0053
(2018/08/28)
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- Synthesis and mesomorphic properties of laterally fluorinated alkyl 4′′-alkylterphenyl-4-yl carbonate liquid crystals
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Fifteen series of homologues of a variety of mono-, di- and trifluorosubstituted alkyl 4′′-alkylterphenyl-4-yl carbonates have been synthesized and their mesomorphic properties have been determined. From among 95 prepared compounds, 40 pure nematogens have been found, as well as 55 mesogens with orthogonal and tilted smectic phases in broad temperature ranges. The type and combination of the LC phase strongly depend on the position and number of the fluorine atoms. Physical properties and correlations between the molecular core fluorosubstitution, the length of the terminal chains and the type and sequence of the liquid crystalline phases, have been determined. The compounds are useful for the formulation of nematic mixtures as well as ferroelectric ones.
- Choluj, Artur,Kula, Przemyslaw,Dabrowski, Roman,Tykarska, Marzena,Jaroszewicz, Leszek
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p. 891 - 900
(2014/01/23)
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- Dihalogenobenzene derivatives
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The invention relates to dihalogenobenzene derivatives of the formula I wherein R1, R2, A1, A2, A3, Z1, Z2 and n are as defined in the specification.
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- Derivatives of 2,3-difluorobenzoic acid
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Derivatives of 2,3-Difluorobenzoic acid compounds of the formula I STR1 in which R1 and R2, independently of one another, are each an alkyl group having 1 to 15 C atoms, in which, in addition, one or two non-adjacent CH2 g
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- Process for the preparation of 2,3-difluorobenzenes
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1,4-disubstituted 2,3-difluorobenzenes according to formula I are suitable as intermediates for the synthesis of liquid crystalline compounds.
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