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    CO-NITRATING
    403.
    发明专利
    CO-NITRATING 未知

    公开(公告)号：CA1173254A

    公开(公告)日：1984-08-28

    申请号：CA402526

    申请日：1982-05-07

    Applicant: HERCULES INC

    Inventor： ZEIGLER EDWARD H JR

    IPC: C07C201/06 ,  C06B25/00 ,  C07C67/00 ,  C07C201/00 ,  C07C201/02 ,  C07C203/04

    Abstract: Zeigler Case 2 CO-NITRATING of the Invention It has been discovered that when co-nitrating a mixture of trimethylolethane and diethylene glycol, a storage stable spent acid can be obtained if during the co-nitration an excess of from about 60 to about 100% by weight of nitric acid over that stoichiometrically required is employed.

    Improvements in or relating to nitrogen-containing organic compounds
    405.
    发明专利
    Improvements in or relating to nitrogen-containing organic compounds 未知

    公开(公告)号：GB770619A

    公开(公告)日：1957-03-20

    申请号：GB1590953

    申请日：1953-06-09

    Applicant: ROBERT NEVILLE HASZELDINE

    IPC: C07C201/00 ,  C07C201/06 ,  C07C205/08 ,  C07C205/09 ,  C07C207/00

    Abstract: The invention comprises fluorinated nitro compounds, and their preparation by oxidation of nitroso compounds of formula where Q, S and T are bromine, chlorine, fluorine, or a halogenated hydrocarbon group containing at least one fluorine atom on the carbon atom nearest to the carbon atom in the formula, and where at least one of Q, S and T is fluorine when each of Q, S and T are halogen atoms. The nitroso starting compounds may have the formul RCXYNO, R1R2CYNO and R3R4R5CNO, where X and Y are fluorine chlorine or bromine, and R, R1, R2, R3, R4 and R5 are halogenoalkyl, halogenoalkenyl, halogenocycloalkyl, halogenocycloalkenyl or haloaryl groups containing 1 to 20 carbon atoms and containing at least one fluorine atom on the carbon atom nearest to the carbon atom in the formula. The nitroso compounds are oxidized with oxygen, oxides of nitrogen, dimanganese heptoxide, lead dioxide or chromic oxide in a sealed tube at a temperature between 0 DEG and 150 DEG C. and pressure between 0.1 and 50 atmospheres. In examples, trifluoronitromethane, pentafluoronitroethane, heptafluoronitropropane, and chlorodifluoronitromethane are prepared from the corresponding nitroso compounds. Lists of fluorine-containing nitro and nitroso compounds are given. The preparation of the nitroso compounds by reacting the corresponding iodo compounds with nitric oxide in the presence of light and of mercury is described. Specification 770,618 is referred to.

    Fluconazole drugs intermediates 2,4-dinitrobenzoic acid synthesis method
    406.
    发明专利
    Fluconazole drugs intermediates 2,4-dinitrobenzoic acid synthesis method 未知

    公开(公告)号：AU2018100367A4

    公开(公告)日：2018-05-17

    申请号：AU2018100367

    申请日：2018-03-25

    Applicant: CHENGDU ZHONG HENG HUA TIE TECHNOLOGY CO LTD

    Inventor： PENG XIANGLIANG

    IPC: C07C201/14 ,  C07C201/06 ,  C07C205/22 ,  C07C205/60

    Abstract: Abstract Fluconazole drugs intermediates 2,4-dinitrobenzoic acid synthesis method, comprises the following steps: 2 mol 2-amino-4-nitro-6-hydroxybutylbenzene and 4-5 5 mol 2- (methoxymethoxy) ethanol solution were added to the reaction vessel, controlled the stirring speed at 90-120 rpm, raised the temperature of the solution to 40-50 C, added 3-4 mol trimethyl antimony by 3-5 times, the adding time was controlled in 70-80 min, continued to react 2-3 h, precipitated the solid, filtrated, washed with potassium bromide solution, washed with diphenyl ether solution, 10 washed with 2,3-dimethylaniline solution, reduced the temperature of the solution to 3-6 'C, precipitated the crystals again, dehydrated with dehydration, got the finished product 2,4-dinitrobenzoic acid.

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