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    CATALYTIC SYNTHESIS OF VITAMIN A INTERMEDIATE
    42.
    发明申请
    CATALYTIC SYNTHESIS OF VITAMIN A INTERMEDIATE 有权
    维生素A中间体的催化合成

    公开(公告)号：US20150031910A1

    公开(公告)日：2015-01-29

    申请号：US14368914

    申请日：2012-12-14

    Applicant: DSM IP ASSETS B.V.

    Inventor： Werner Bonrath ,  Bettina Wuestenberg ,  Thomas Netscher ,  Jan Schuetz

    IPC: C07C67/29

    CPC classification number: C07C67/29 ,  C07C403/12 ,  C07C2601/16

    Abstract: The present invention relates to a process of production of a compound, which is useful as an intermediate (building block) in organic synthesis, especially in the synthesis of vitamin A or β-carotene and derivatives thereof, e.g. canthaxanthin, astax-anthin or zeaxanthin.

    Abstract translation: 本发明涉及一种化合物的制备方法，其可用作有机合成中的中间体（结构单元），特别是合成维生素A或其组合物 - 胡萝卜素及其衍生物。 角黄素，阿斯泰沙星或玉米黄质。

    NOVEL PROCESS FOR THE MANUFACTURE OF METHYL LIMONITRILE
    45.
    发明申请
    NOVEL PROCESS FOR THE MANUFACTURE OF METHYL LIMONITRILE 有权
    用于制造甲基硫酸钠的新工艺

    公开(公告)号：US20140378695A1

    公开(公告)日：2014-12-25

    申请号：US14377095

    申请日：2013-02-11

    Applicant: DSM IP ASSETS B.V.

    Inventor： Angela Wildermann ,  Werner Bonrath ,  Raphael Beumer ,  Silke Dorn

    IPC: C07C253/10 ,  C07C253/34 ,  C07C253/30

    CPC classification number: C07C253/10 ,  C07C253/30 ,  C07C253/34 ,  C07C255/07

    Abstract: 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 1 in an organic solvent, and wherein the organic solvent is a solvent which forms a heteroazeotrop with water; b) removing the solvent and the base of the reaction mixture obtained after having performed step a) or step c) by distillation to obtain a reaction mixture, whereby this step may optionally be performed in the presence of a co-base 2; c) isomerizing the reaction mixture obtained after having performed step a) or step b) to obtain an isomerized reaction mixture in the presence of a co-base 2; whereby step b) can be performed before or after step c).

    Abstract translation: 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1，其中有机溶剂是与水形成杂合性的溶剂; b）通过蒸馏除去在进行步骤a）或步骤c）之后获得的反应混合物的溶剂和碱，得到反应混合物，由此该步骤可任选地在共碱2存在下进行; c）使在步骤a）或步骤b）中获得的反应混合物异构化，以在共碱2存在下得到异构化反应混合物; 由此步骤b）可以在步骤c）之前或之后进行。

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