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    PREPARATION OF BETA-HYDROXY-ALPHA-AMINOBUTYRIC ACID
    91.
    发明专利
    PREPARATION OF BETA-HYDROXY-ALPHA-AMINOBUTYRIC ACID 失效

    公开(公告)号：JPS58144352A

    公开(公告)日：1983-08-27

    申请号：JP2258982

    申请日：1982-02-17

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： KIYOURA TADAMITSU ,  SUDOU ISAMU ,  MATSUDA FUJIO ,  KATOU KOUZOU

    IPC: C07B61/00 ,  B01J23/00 ,  B01J23/72 ,  B01J27/00 ,  B01J27/08 ,  B01J27/16 ,  B01J31/00 ,  B01J31/04 ,  C07C67/00 ,  C07C227/00 ,  C07C227/16 ,  C07C229/22

    Abstract: PURPOSE:To prepare the titled compound useful as a feed additive, etc., easily, in high yield, economically in an industrial scale, by reacting glycine with acetaldehyde in the presence of a catalytic amount (less than equivalent to glycine) of a copper compound. CONSTITUTION:The objective compound can be prepared by reacting glycine with acetaldehyde and an alkaline substance (e.g. NaOH) in the presence of less than equivalent amount (based on glycine) of a copper compound (e.g Cu2O) in a proper solvent at room temperature -100 deg.C, and precipitating and removing the copper compound used as a catalyst from the reaction system after the reaction by passing hydrogen sulfide gas into the reaction liquid thereby converting the copper compound to copper sulfide. EFFECT:Since the amount of the copper compound is catalytic, the removal of copper can be carried out easily compared with the conventional process. The yield of the threo-compound is essentially the same as the case using equivalent amount of the copper compound.

    PREPARATION OF PYROMELLITIC ANHYDRIDE
    93.
    发明专利
    PREPARATION OF PYROMELLITIC ANHYDRIDE 失效

    公开(公告)号：JPS55154966A

    公开(公告)日：1980-12-02

    申请号：JP6157179

    申请日：1979-05-21

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HASHIMOTO MASAO ,  MATSUDA FUJIO ,  KOGURE YASUO

    IPC: C07D493/04 ,  B01J23/22 ,  C07D307/89

    Abstract: PURPOSE:To prepare the title compound useful as an intermediate of a heat-resistant resin, from an easily available raw material, directly, in one step, and in high yield, by the gas phase oxidation of pentaalkylphenol, 2,3,5,6-tetraalkylphenol, etc. CONSTITUTION:The title compound is prepared by contacting a compound of formula (R1,4 are H or alkyl; R2,3,5,6 are alkyl; wherein alkyl means 1-4C alkyl, halogenated alkyl, hydroxyalkyl, and acetyl) with oxygen or oxygen-containing gas in the presence of a gas-phase oxidation catalyst, pref. vanadium oxide which may be incorporated with a compound of phosphorus or lithium, etc. The contact may be carried out by a fixed bed or a fluidized bed. The molar ratio of the raw material to oxygen is 1 to 100-10,000, and the reaction temperature is 300-650 deg.C.

    PREPARATION O DINITROBIPHENYL ETHERS
    94.
    发明专利
    PREPARATION O DINITROBIPHENYL ETHERS 失效

    公开(公告)号：JPS5455536A

    公开(公告)日：1979-05-02

    申请号：JP11860277

    申请日：1977-10-04

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： HONDA TADATOSHI ,  HOSONO YOUICHI ,  MATSUDA FUJIO

    IPC: C07C205/38 ,  C07C67/00 ,  C07C201/00 ,  C07C205/59

    Abstract: PURPOSE:To obtain the title compounds useful as raw materials for medicines, pesticides, etc. without using polar aprotic solvents, by reacting halonitrobenzenes with carbonates or hydrogencarbonates of alkali metals in the presence of nitrous ions and diamines easily. CONSTITUTION:Halonitrobenzenes, e.g. p-chloronitrobenzene, etc., of formula I: (X is halogen, Y and Y are H, alkyl, alkoxy, or carboxyl groups; n is 1 or 2, at least one of the nitro groups is at the o- or p-position to X) are reacted with alkali metal carbonates, e.g. potassium carbonate, etc., or hydrogencarbonates in the presence of nitrous ions, e.g. sodium nitrite, etc., in an amount of 0.005-0.5n mole per mole of the starting compounds, and diamines, e.g. triethylenediamine, etc., in an amount of 0.005-0.5 mole per mole of the starting compounds to give dinitrobiphenyl ethers, e.g. bis(4-nitrophenyl)ether, etc., of formula II.

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