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    LARGE-CAPACITY RECORDING MEDIUM
    1.
    发明专利
    LARGE-CAPACITY RECORDING MEDIUM 失效

    公开(公告)号：JPH10101953A

    公开(公告)日：1998-04-21

    申请号：JP18617497

    申请日：1997-07-11

    Applicant: CIBA GEIGY AG

    Inventor： SCHMIDHALTER BEAT ,  WOLLEB HEINZ ,  BAUMANN MARCUS

    IPC: B41M5/26 ,  C07D487/22 ,  C09B47/00 ,  G11B7/24 ,  G11B7/244 ,  G11B7/248

    Abstract: PROBLEM TO BE SOLVED: To obtain a large-capacity recording medium having a lightfastness much more excellent than a recording medium having characteristics currently known by using a specific oxoporphyrin metal complex as a recording layer. SOLUTION: This optical recording medium has a recording layer substantially comprising at least one dye represented by formula I (wherein R1 and R2 are each a 1-8C alkyl or a 2-8C alkenyl; R3 , R6 , R9 , and R12 are each H, a halogen, CN, etc.; R4 , R5 , R7 , R8 , R10 , and R11 are each H, a halogen NO2 , CHO, etc.; and M is H2 , a divalent metal atom, an oxometal, a halogenometal, a hydroxymetal, etc.), or its chlorination or bromination product. This oxoporphyrin dye has a refractive index of 1.8 or higher in the range of 400-500nm. A substrate used is pref. transparent and has a thickness of 0.01-10mm. The recording layer is sandwiched between the substrates and a reflecting layer and has a thickness of 10-100nm. The absorbance of the recording layer is 0.1-1.0 at the absorption max. The thickness of the reflecting layer is 10-150nm. The reflectance of the optical recording medium as a whole is 60% or higher.

    4.
    发明专利
    未知

    公开(公告)号：NO841582L

    公开(公告)日：1984-10-23

    申请号：NO841582

    申请日：1984-04-18

    Applicant: CIBA GEIGY AG

    Inventor： WENK PAUL ,  BAUMANN MARCUS ,  BREITENSTEIN WERNER

    IPC: C07D307/83 ,  C07D405/04 ,  C07D

    Abstract: Prodn. of benzofuranones of formula (I) (and their salts, tautomers and/or isomers) comprises converting X in cpds. (II) (or their salts) to OH, opt. followed by conversion of salts to free bases (or vice versa) and/or sepn.of isomers. - R1 = H or aliphatic gp. R2 = amino substd. by a divalent hydrocarbyl gp. ring A may contain other substitis.

    LACTONES
    8.
    发明专利
    LACTONES 未知

    公开(公告)号：ZA827846B

    公开(公告)日：1983-08-31

    申请号：ZA827846

    申请日：1982-10-27

    Applicant: CIBA GEIGY AG

    Inventor： WENK PAUL ,  BREITENSTEIN WERNER ,  BAUMANN MARCUS

    IPC: A61K31/34 ,  A61K31/343 ,  A61P25/04 ,  A61P29/00 ,  C07C59/76 ,  C07D307/83 ,  C07D471/04 ,  C07D ,  A61K

    Abstract: The invention relates to novel lactones, especially benzofuranones of the general formula (I) in which R1 represents hydrogen or an aliphatic radical, R2 represents an amino group di-substituted by two monovalent hydrocarbon radicals, and the aromatic ring A may be additionally substituted, and their salts and/or isomers, processes for the manufacture of compounds of the formula (I) and their salts and isomers, pharmaceutical preparations containing these compounds, and their use as the active ingredients of medicaments and/or for the manufacture of pharmaceutical preparations.

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