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    PREPARATION OF MONOALKYL P-PHENYLENEDIACRYLATE
    92.
    发明专利
    PREPARATION OF MONOALKYL P-PHENYLENEDIACRYLATE 失效

    公开(公告)号：JPS60226844A

    公开(公告)日：1985-11-12

    申请号：JP8316984

    申请日：1984-04-25

    申请人： KOGYO GIJUTSUIN

    发明人： NAKANISHI FUSAE

    IPC分类号： C09K19/06 ,  C07C67/00 ,  C07C67/317 ,  C07C69/618

    摘要： NEW MATERIAL:A compound of the formula [R is CnH2n+1 (n is an integer 6-22)]. EXAMPLE:Mono-n-heptyl p-phenylenediacrylate. USE:Useful as a raw material and intermediate for high polymers, raw material for various photosensitive resins, raw material for display materials, various optical materials and recording materials, etc. PREPARATION:A dialkyl p-phenylenediacrylate is reacted with an alkali matal alcoholate in an alcohol consisting of the same residue as the alkyl group constituting the ester to give the aimed compound of the formula. The metal alcoholate and the p-phenylenediacrylic acid are used in equimolar amounts to carry out the reaction.

    PHTHALONITRILE DERIVATIVE AND LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME
    94.
    发明专利
    PHTHALONITRILE DERIVATIVE AND LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME 失效

    公开(公告)号：JPS58146544A

    公开(公告)日：1983-09-01

    申请号：JP2944482

    申请日：1982-02-25

    申请人： HITACHI LTD ,  MITSUBISHI CHEM IND

    发明人： KOUBI AKIO ,  KITAMURA TERUO ,  KANEKO MASAHARU ,  OZAWA TETSUO

    IPC分类号： C07C67/00 ,  C07C253/00 ,  C07C255/51 ,  C07C255/53 ,  C07C255/54 ,  C09K19/00 ,  C09K19/06 ,  C09K19/12 ,  C09K19/30 ,  C09K19/32

    摘要： NEW MATERIAL:The compound of formulaI[X and Y are 1-9C alkyl, 1-9C alkoxy, group of formula II, formula III (R is H, halogen, etc.), etc.; provided that at least one of X and Y is not methyl]. EXAMPLE:3,6-Bis-(p-n-propyloxyphenyl)-phthalonitrile. USE:A liquid crystal composition. When the phthalonitrile derivative of formula Iis molten in the state of liquid crystal, it exhibits a large negative dielectric anisotropy of about -20. PROCESS:The compound of formulaIcan be prepared either by reacting the butadiene derivative of formula V with the fumaronitrile of formula VIII, and oxidizing the resultant compound of formula VI with sulfur, or by brominating the compound of formula V in a solvent such as acetic acid and dehydrobrominating the product, or by reacting the compound of formula V with dicyanoacetylene of formula IX to obtain the compound of formula VII, and reacting the compound in the same manner as the formula VI.

    44SUBSTITUTEDDDMETHYLLCINNAMIC ACID
    99.
    发明专利
    44SUBSTITUTEDDDMETHYLLCINNAMIC ACID 失效

    公开(公告)号：JPS5476540A

    公开(公告)日：1979-06-19

    申请号：JP14063077

    申请日：1977-11-25

    申请人： ASAHI GLASS CO LTD

    发明人： KAWAHARA HIROSHI

    IPC分类号： C09K19/06 ,  C07C51/00 ,  C07C57/42 ,  C07C59/64 ,  C07C67/00 ,  C09K19/20

    摘要： NEW MATERIAL:A 4-substituted-beta-methylcinnamic acid of formula II: {R is n- alkyl group [CH3(CH2)m], n-alkoxy group [CH3(CH2)mO]; m is 3-8}. EXAMPLE:4-n-Butyl-beta-methylcinnamic acid. USE:Nematic liquid crystal substances. Intermediates for preparation of 4'-substituted phenyl esters of 4-substituted-beta-methyl cinnamic acid which are room-temperature nematic liquid crystal substances. PROCESS:A 4-substituted acetophenone is reacted with ethyl bromoacetate in the presence of zinc by the Reformatsky reaction to give ethyl 2-hydroxy-2-(4-substituted phenyl)-propionate, which is dehydrated with potassium hydrogensulfate, and hydrolyzed to form the objective compound of formula II.