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    Novel process for the manufacture of methyl limonitrile
    72.
    发明公开
    Novel process for the manufacture of methyl limonitrile 有权
    Neues Verfahren zur Herstellung von Methyllimonitril

    公开(公告)号：EP2628723A1

    公开(公告)日：2013-08-21

    申请号：EP12155593.2

    申请日：2012-02-15

    申请人： DSM IP Assets B.V.

    发明人： Beumer, Raphael

    IPC分类号： C07C253/30 ,  C07C255/07

    CPC分类号： C11B9/0023 ,  C07C253/30 ,  C07C255/07

    摘要： The present invention is directed to a process for the manufacture of methyl limonitrile comprising a mixture of 3,7-dimethyl-2,6-nonadiene nitrile, 3,7-dimethyl-3,6-nonadiene nitrile and 7-methyl-3-methylene-6-nonene nitrile comprising the following steps:
    a) reacting 6-methyl-5-octen-2-one with cyano acetic acid and removing carbon dioxide and water, wherein the reaction and the removal of carbon dioxide and water are performed in the presence of a base and a co-base in an organic solvent, wherein the base is pyridine, wherein the co-base is 1,4-diamino butane, and wherein the organic solvent is a solvent which forms a heteroazeotrop with water;
    b) removing the solvent and pyridine of the reaction mixture obtained after having performed step a) or step c) by distillation to obtain a reaction mixture;
    c) isomerizing the reaction mixture obtained after having performed step a) or step
    b) to obtain an isomerized reaction mixture;

    whereby step b) can be performed before or after step c).

    摘要翻译： 本发明涉及一种制备甲基有限公司的方法，该方法包括3,7-二甲基-2,6-壬二烯腈，3,7-二甲基-3,6-壬二烯腈和7-甲基-3- 亚甲基-6-壬烯腈包括以下步骤：a）使6-甲基-5-辛烯-2-酮与氰基乙酸反应并除去二氧化碳和水，其中二氧化碳和水的反应和除去在 在有机溶剂中存在碱和共碱，其中碱为吡啶，其中助碱为1,4-二氨基丁烷，其中有机溶剂为与水形成杂合性的溶剂; b）在通过蒸馏进行步骤a）或步骤c）之后，除去反应混合物中的溶剂和吡啶，得到反应混合物; c）使进行步骤a）或步骤b）后得到的反应混合物异构化得到异构化反应混合物; 其中步骤b）可以在步骤c）之前或之后进行。