Process for the preparation of 5-nitro-1,4-naphthoquinone
    21.
    发明授权
    Process for the preparation of 5-nitro-1,4-naphthoquinone 失效
    5-硝基-1,4-萘醌的制备方法

    公开(公告)号:US4880571A

    公开(公告)日:1989-11-14

    申请号:US921918

    申请日:1986-10-22

    CPC分类号: C07C201/12 C07C201/14

    摘要: A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate.The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.

    摘要翻译: 制备式“IMAGE”的5-硝基-1,4-萘醌的方法,其中R是氢,C1-C4烷基或C1-C4烷氧基,通过1-硝基萘的氧化或适当取代的1-硝基萘 该方法包括用硫酸锰(III)作为氧化剂或硫酸锰(III)和硫酸铈的混合物进行反应。 消耗的硫酸锰(III)可以以较好的电流产率电解再生。 该方法是环境安全的,因为氧化剂和溶剂(如果有的话)可以重复使用。