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    MONOALLYLNAPHOTHOL COMPOUND, CURING AGENT FOR EPOXY RESIN CONTAINING THE SAME COMPOUND AND EPOXY RESIN COMPOSITION
    5.
    发明专利
    MONOALLYLNAPHOTHOL COMPOUND, CURING AGENT FOR EPOXY RESIN CONTAINING THE SAME COMPOUND AND EPOXY RESIN COMPOSITION 失效

    公开(公告)号：JPH07138201A

    公开(公告)日：1995-05-30

    申请号：JP28814193

    申请日：1993-11-17

    Applicant: DAI ICHI KOGYO SEIYAKU CO LTD

    Inventor： NAKA AKIHIRO ,  ITO SHUICHI

    IPC: C07C39/225 ,  C08G59/40 ,  C08G59/62 ,  C08L63/00 ,  C09K3/10

    Abstract: PURPOSE:To obtain a new monoallylnaphthol compound useful as a dilluent, a denaturant or a modifier for an epoxy resin curing agent and imparting excellent workability to the agent by lowering the melting point and melt viscosity of the curing agent and capable of providing a cured product free from crack. CONSTITUTION:This compound is a naphthol compound having one ally group expressed by formula I (R is H or OH; when R is H, the position of OH is 2-position, that is, beta-position), e.g. a monoallyl beta-naphthol of formula II. The compound of formula I is obtained by uniformly mixing, e.g. a naphthol with a base and as necessary, an organic solvent to phenoxidize the naphthol, carrying out allylation reaction whole dropping an allyl halide to the solution system for a long time and subjecting the reactional product to Claisen's rearrangement by high-temperature heating. This epoxy resin composition is obtained from the naphthol compound of formula I, an aldehyde condensation product of a naphthol and an epoxy resin. The composition has high glass transition temperature and excellent heat resistance, moisture resistance, adhesiveness and flexibility and it can prevent occurrence of crack in a package.

    PREPARATION OF QUINONE
    10.
    发明专利
    PREPARATION OF QUINONE 失效

    公开(公告)号：JPS5718641A

    公开(公告)日：1982-01-30

    申请号：JP93181

    申请日：1981-01-06

    Applicant: TAKEDA CHEMICAL INDUSTRIES LTD

    Inventor： TERAO SHINJI ,  KATOU KANEYOSHI

    IPC: C07C43/23 ,  C07C27/00 ,  C07C37/00 ,  C07C39/19 ,  C07C39/225 ,  C07C39/23 ,  C07C41/00 ,  C07C45/00 ,  C07C46/00 ,  C07C50/06 ,  C07C50/10 ,  C07C50/26 ,  C07C67/00

    Abstract: PURPOSE:To prepare hydroquinone or a quinone derivative useful as a medicine or its intermediate, by reacting a hydroquinone derivative with a halogenoprenyl derivative, and subjecting the reaction product to reductive elimination reaction, and if necessary, protecting group-elimination reaction and oxidation reaction. CONSTITUTION:A hydroquinone derivative of formula I (R is CH3 or OCH3; or two R together form -CH=CH-CH=CH-; Z is protecting group; Y is arylthio, arylsulfinyl, or arylsulfonyl; n is an integer 1-9) is made to react with a prenyl derivative of formula II (X is halogen; m is an integer 1-9) in an anhydrous organic solvent under basic conditions (e.g. n-butyl lithium) at -78-+20 deg.C to obtain the compound of formula III, which is subjected to the reductive elimination reaction of the Y group, protecting group eliminating reaction, oxidation reaction, etc. to afford the compound of formula IV or formula V [R is CH3 or OCH3; or two R together form -CH=CH-CH=CH- or -CH2-CH=CH-CH2- (in this case, the compound is novel)].

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