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    NOVEL PROCESS FOR THE MANUFACTURE OF METHYL LIMONITRILE
    21.
    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：US20150031597A1

    公开(公告)日：2015-01-29

    申请号：US14378551

    申请日：2013-02-11

    Applicant: DSM IP ASSETS B.V.

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

    IPC: C11B9/00

    CPC classification number: C11B9/0023 ,  C07C253/30 ,  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 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).

    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，其中所述碱为吡啶，其中所述共碱为1,4-二氨基丁烷，并且其中所述有机溶剂是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; 由此步骤b）可以在步骤c）之前或之后进行。

    Process for the production of 4-alkanoyloxy-2-methylbutanoic acid
    27.
    发明授权
    Process for the production of 4-alkanoyloxy-2-methylbutanoic acid 有权
    生产4-烷酰氧基-2-甲基丁酸的方法

    公开(公告)号：US09447017B2

    公开(公告)日：2016-09-20

    申请号：US14401868

    申请日：2013-06-05

    Applicant: DSM IP ASSETS B.V.

    Inventor： Werner Bonrath ,  Jan Schütz ,  Bettina Wüstenberg ,  Thomas Netscher

    IPC: C07D311/00 ,  C07C69/66 ,  C07C67/29 ,  C07C29/15 ,  C07C45/00 ,  C07D311/72

    CPC classification number: C07C67/29 ,  C07C29/15 ,  C07C45/008 ,  C07D311/72 ,  C07C69/14

    Abstract: The present invention relates to an improved process for the production of 4-alkanoyloxy-2-methylbutanoic acid, as well as to the use of such compounds in organic syntheses, especially in processes forming intermediates (building blocks) for the synthesis of organic compounds comprising isoprene (isoterpene) units, such as β-carotene or other carotenoids (e.g. canthaxanthin, zeaxanthin or astaxanthin) or as vitamin E or vitamin A as well as other structurally similar compounds.

    Abstract translation: 本发明涉及一种生产4-烷酰氧基-2-甲基丁酸的改进方法，以及这些化合物在有机合成中的用途，特别是在形成用于合成有机化合物的中间体（构成单元）的方法中的用途，所述方法包括 异戊二烯（异萜烯）单元，例如β-胡萝卜素或其他类胡萝卜素（例如角黄素，玉米黄质或虾青素）或维生素E或维生素A以及其它结构相似的化合物。

    Catalytic synthesis of vitamin A intermediate
    30.
    发明授权
    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：US09040742B2

    公开(公告)日：2015-05-26

    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 ,  C07C69/00

    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, astaxanthin 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，虾青素或玉米黄质。

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