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    Process for the production of 4-alkanoyloxy-2-methylbutanoic acid
    15.
    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
    16.
    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。

    Use of substituted chroman-6-ols with extended lipophilic side chains
    17.
    发明授权
    Use of substituted chroman-6-ols with extended lipophilic side chains 有权

    公开(公告)号：US11447459B2

    公开(公告)日：2022-09-20

    申请号：US17041910

    申请日：2019-03-29

    Applicant: DSM IP ASSETS B.V.

    Inventor： Laure Clasadonte ,  André Duesterloh ,  Weerasinghe Indrasena ,  Thomas Netscher ,  René Stemmler

    IPC: C07D311/72

    Abstract: The present invention is directed towards the use of substituted chroman-6-ols with extended lipophilic side chains of formula (I) wherein one of the two substituents R1 and R2 is C12-21-alkyl and the other of the two substituents R1 and R2 is either hydrogen or C1-5-alkyl or (CH2)n—OH with n being an integer from 1 to 5, and wherein A is CH(R3), and wherein R3, R4 and R6 are independently from each other H or C1-4-alkyl, and wherein R5 is H or OH or C1-4-alkyl or C1-4-alkoxy; with the proviso that at least two of R4, R5 and R6 are not methyl, when R3 is H and one of the substituents R1 and R2 is methyl and the other of the two substituents R1 and R2 is C12-21-alkyl, as antioxidants, especially in feed such as pet food and feed ingredients such as fish meal, insect meal and poultry meal, as well as PUFA-containing oil such as marine oil, microbial oil, fungal oil, algal oil and PUFA-containing plant oil. The present invention is further directed towards feed ingredients and feed for insects, aquatic and terrestrial animals comprising such substituted chroman-6-ols with extended lipophilic side chains of formula (I).

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