- New preparation method of trans-trans dicyclohexyl alkane liquid crystal compounds
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The invention discloses a preparation method of trans-trans dicyclohexyl alkane liquid crystal compounds. According to the preparation method, 1-(4-(4-alkylcyclohexyl)phenyl)alkyl-1-one is used as a raw material; a benzene ring is converted into a cyclohexyl ring by means of a catalytic hydrogenation reaction; transposition is performed under the alkaline condition, so that 1-(4-(4-alkylcyclohexyl)cyclohexyl)alkyl-1-ol is obtained; the trans-trans dicyclohexyl alkane liquid crystal compounds are finally obtained by carrying out an oxidation reaction and a reduction reaction. The preparation method provided by the invention is unique in synthetic route, not only realizes green chemical industry, but also enables the product yield to be greatly increased, improves the product quality, and reduces the cost.
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Paragraph 0066; 0070; 0076
(2019/04/10)
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- Method of producing hydrogen of the reaction product and substrate
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PROBLEM TO BE SOLVED: To provide a new production method requiring no reactor having high stirring power for high-temperature and high-pressure conditions in a gas-liquid catalytic reaction of a liquid phase of a substrate with hydrogen in the presence of a solid catalyst. SOLUTION: Micro or nano bubbles are introduced into a liquid phase consisting of a solvent and a substrate so that a reaction product is produced by gas-liquid contact of the substrate with hydrogen in the presence of the solid catalyst. The substrate is one of organic compounds having an unsaturated carbon bond and secondary and tertiary alcohols. COPYRIGHT: (C)2013,JPOandINPIT
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Paragraph 0051; 0052
(2017/03/24)
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- Bicyclohexyls
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New bicyclohexyls of the formula I wherein R1 and R2 are each alkyl which has 1-10 C atoms and in which one or two CH2 group(s) can be replaced by 0 atoms, and Cy is 1,4-cyclohexylene, are suitable for use as the coponents of liquid-crystal dielectrics.
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- Bicyclohexyls
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New bicyclohexyls of the formula I wherein R1 and R2 are each alkyl which has 1-10 C atoms and in which one or two CH2 group(s) can be replaced by O atoms, and Cy is 1,4-cyclohexylene, are suitable for use as the components of liquid-crystal dielectrics.
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