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    FLUORAN COMPOUND AND ITS PREPARATION
    6.
    发明专利
    FLUORAN COMPOUND AND ITS PREPARATION 失效

    公开(公告)号：JPS5867755A

    公开(公告)日：1983-04-22

    申请号：JP16607381

    申请日：1981-10-16

    申请人： SUMITOMO CHEMICAL CO

    发明人： AKAMATSU TAKASHI

    IPC分类号： C09B11/00 ,  B41M5/145 ,  B41M5/327 ,  C07D493/10 ,  C09B11/28

    摘要： NEW MATERIAL:The compound of formulaI[R1 and R2 are 1-10C alkyl; R3 is 1-10C alkyl, alkoxyalkyl, or phenylalkyl; R4 is 1-10C alkyl, alkoxy(alkoxy) alkyl, cyclo(alkoxy)alkyl, phenoxy(alkoxy)alkyl, furyl(alkoxy)alkyl, etc.; X is H or halogen; n is 1-4]. EXAMPLE:3-Diethylamino-6-chloro-7-cyclohexylaminofluoran. USE:Color developing agent for heat-sensitive recording paper. It exhibits black color development when being contacted with an acidic substance, and has excellent light fastness and water resistance. PROCESS:The compound of formula II[e.g. 2-(4'-diethylamino-2'-hydroxy-benzoyl) benzoic acid, etc.]is made to react with the compound of formula III (e.g. 2- chloro-4-hydroxy-N-cyclohexylaniline, etc.) in the presence of a dehydrative condensation agent at -5-+90 deg.C for several to several tens hours. The reaction product is poured into water, made to alkaline state, and if necessary, heat- treated to obtain the objective compound.

    PREPARATION OF 1*44DIAMINOANTHRAQUINONEE22SULFONIC ACID
    8.
    发明专利
    PREPARATION OF 1*44DIAMINOANTHRAQUINONEE22SULFONIC ACID 失效

    公开(公告)号：JPS5690053A

    公开(公告)日：1981-07-21

    申请号：JP16897579

    申请日：1979-12-24

    申请人： SUMITOMO CHEMICAL CO

    发明人： AKAMATSU TAKASHI ,  KUWABARA YUKIO

    IPC分类号： C07C309/53 ,  C07C67/00 ,  C07C301/00 ,  C07C303/06

    摘要： PURPOSE:To obtain the titled compound which is an intermediate for a disperse dye in high yield and purity through a relatively simple operation, by oxidizing leuco- 1,4-diaminoanthraquinone with air, sulfating the oxidation product, and rearranging the sulfate under heating in the same reactor. CONSTITUTION:Leuco-1,4-diaminoanthraquinone is oxidized with air in an inert solvent, e.g. 1,2,4-trichlorobenzene, to give 1,4-diaminoanthraquinone, which is then sulfated with sulfuric acid to afford 1,4-diaminoanthraquinone.sulfate. The sulfate is then heated at 190 deg.C or above, preferably 200-220 deg.C, to give 1,4-diaminoanthraquinone-2-sulfonic acid. The oxidation reaction is carried out at 100 deg.C, preferably 130-160 deg.C. An organic acid salt, e.g. cobalt salt, may be used as a catalyst. The concentration of the sulfuric acid is 70% or more, preferably 90- 100%.

    FLUORAN COMPOUND* PRODUCTION THEREOF AND COPYING PAPER EMPLOYING THE SAME
    9.
    发明专利
    FLUORAN COMPOUND* PRODUCTION THEREOF AND COPYING PAPER EMPLOYING THE SAME 失效

    公开(公告)号：JPS5626955A

    公开(公告)日：1981-03-16

    申请号：JP10207679

    申请日：1979-08-09

    申请人： SUMITOMO CHEMICAL CO

    发明人： AKAMATSU TAKASHI ,  KUWABARA YUKIO

    IPC分类号： C09B11/28 ,  B41M5/145

    摘要： NEW MATERIAL:Fluoran compounds of formula I (wherein R1, R2 are 1-3C alkyl, cycloalkyl, benzyl, phenyl, methyl-substd. phenyl; R3 is H, chlorine, 1-4C alkyl; n is 1-3; R4 is H, methyl; ring A is benzene ring, naphthalene ring). USE:Pressure-sensitive or heat-sensitive copying paper (Said fluoran cpd. per se are colorless. When they are contacted with an acidic substance, they develops a dark black color. They are an electron-donative color coupler which excels in light resistance and solubility in an org. solvent) PREPARATION:A compound of formula II is reacted with a compound of formula III in the presence of a dehydrating-condensing agent.

    PREPARATION OF 11AMINOO22BROMOO44HYDROXYANTHRAQUINONE
    10.
    发明专利
    PREPARATION OF 11AMINOO22BROMOO44HYDROXYANTHRAQUINONE 失效

    公开(公告)号：JPS55129249A

    公开(公告)日：1980-10-06

    申请号：JP3754879

    申请日：1979-03-28

    申请人： SUMITOMO CHEMICAL CO

    发明人： AKAMATSU TAKASHI ,  KUWABARA YUKIO

    IPC分类号： C07C225/36

    摘要： PURPOSE:To obtain the title compound, useful as an intermediate for the synthesis of compounds for disperse dyes, easily, by heating a specific compound obtained by monobromination (not by dibromination) of 1-aminoanthraquinone, in concentrated sulfuric acid in the presence of boric acid. CONSTITUTION:1-Amino-2-bromoanthraquinone is heated at 140-180 deg.C in concentrated sulfuric acid or fuming sulfuric acid, preferably 90% concentrated sulfuric acid or 3% fuming sulfuric acid (esp. 94-100% sulfuric acid is used in an amount of 4-25wt part, preferably 5-10 weight part, based on 1 part of 1-amino-2-bromanthraquinone), in the presence of boric acid to give 1-amino-2-bromo-4-hydroxyanthraquinone. The starting material, 1-amino-20-bromoanthraquinone, is obtained by treating 1-aminoanthraquinone with 1mol of bromine in glacial acetic acid, and heating the product.