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    Process for the preparation of symmetrical azodinitrile dicarboxylic acids from keto acids
    21.
    发明公开
    Process for the preparation of symmetrical azodinitrile dicarboxylic acids from keto acids 失效
    Verfahren zur Herstellung von symmetricrischenAzodinitrildicarbonsäurenausKetosäuren。

    公开(公告)号：EP0436183A1

    公开(公告)日：1991-07-10

    申请号：EP90124725.4

    申请日：1990-12-19

    申请人： THE B.F. GOODRICH COMPANY

    发明人： Lai, John Ta-yuan

    IPC分类号： C07C245/04

    CPC分类号： C07C255/65

    摘要： The preparation of symmetrical azodinitriles prepared from keto acids is disclosed. A keto acid of the formula

    is reacted with M(CN) x and an ammonia source to obtain an aminonitrile metal carboxylate of the formula

    The aminonitrile metal carboxylate is reacted with M₁(OCl) x with the proviso that no alcohol or surface active agent is utilized to form a metal salt of an azo compound. This metal salt is reacted with mineral acid to give the symmetrical azodinitrile compound of the formula

    R₁ is an alkyl group containing from 1 to about 12 carbon atoms and R₂ is an alkylene group containing from 1 to about 12 carbon atoms. M is a metal comprising lithium, sodium, potassium, magnesium or calcium; M₁ is a metal comprising sodium, potassium or calcium; and x is the valence of M and M₁. In other embodiments, the preparation of mixed, symmetrical azonitrile initiators and mixed azodinitrile initiators via hydrazo intermediates, prepared from keto acids and aminonitrile and keto acids and a hydrazine source, a ketone and hydrochloric acid respectively is disclosed.

    摘要翻译： 公开了由酮酸制备的对称偶氮二腈的制备。 使式CHEM的酮酸与M（CN）x和氨源反应，得到式CHEM的氨基腈金属羧酸盐。氨基腈金属羧酸盐与M1（OCl）x反应，条件是无 醇或表面活性剂用于形成偶氮化合物的金属盐。 该金属盐与无机酸反应，得到式CHEM的对称氮丁腈化合物，R 1为含有1至约12个碳原子的烷基，R 2为含有1至约12个碳原子的亚烷基。 M是包含锂，钠，钾，镁或钙的金属; M1是包含钠，钾或钙的金属; x是M和M1的化合价。 在其它实施方案中，公开了分别由酮酸和氨基腈和酮酸和肼源，酮和盐酸制备的混合的对称的偶氮腈引发剂和混合的偶氮丁腈引发剂通过羟基中间体制备。