Preparation of petachloronitrobenzene
    72.
    发明授权
    Preparation of petachloronitrobenzene 失效
    制备氯化亚硝基苯

    公开(公告)号:US3984487A

    公开(公告)日:1976-10-05

    申请号:US638394

    申请日:1975-12-08

    CPC classification number: C07C201/10

    Abstract: A novel method for preparing pentachloronitrobenzene directly from the corresponding pentachlorobenzonitrile compound is disclosed. Pentachlorobenzonitrile is heated in the presence of an excess of sulfuric acid and a nitrating agent, e.g., nitric acid at elevated temperatures of from about 100.degree.C to about 160.degree.C for a time sufficient to convert the pentachlorobenzonitrile to a pentachloronitrobenzene.In one embodiment the pentachlorobenzonitrile compound is first heated in the presence of an excess of concentrated sulfuric acid at temperatures in excess of 180.degree.C to activate the pentachlorobenzonitrile and the activated material is then heated at lower temperatures of about 100.degree. to 120.degree.C in the presence of a nitrating agent to convert the activated pentachlorobenzonitrile to the corresponding pentachloronitrobenzene.

    Abstract translation: 公开了一种从相应的五氯苯腈化合物中直接制备五氯硝基苯的新方法。 在过量的硫酸和硝化剂例如硝酸的存在下,将五氯苄腈在约100℃至约160℃的升高的温度下加热足够的时间以将五氯苄腈转化为五氯硝基苯。

    Alpha-nitro-cinnamic acid derivatives
    73.
    发明授权
    Alpha-nitro-cinnamic acid derivatives 失效
    阿尔法 - 硝酸 - 氨基酸衍生物

    公开(公告)号:US3832387A

    公开(公告)日:1974-08-27

    申请号:US23542172

    申请日:1972-03-16

    CPC classification number: C07C205/53 C07C201/10

    Abstract: Alpha -nitro-cinnamic acid derivatives which are useful in preparing phenylalanines, and a process for obtaining the derivatives by treating the corresponding cinnamic acid esters with nitric oxide or nitrogen dioxide.

    Abstract translation: 可用于制备苯丙氨酸的α-硝基肉桂酸衍生物,以及通过用一氧化氮或二氧化氮处理相应的肉桂酸酯来获得衍生物的方法。

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