Method for producing carotenoids
    41.
    发明申请
    Method for producing carotenoids 失效
    生产类胡萝卜素的方法

    公开(公告)号:US20060106257A1

    公开(公告)日:2006-05-18

    申请号:US10532207

    申请日:2003-11-17

    IPC分类号: C07C45/45

    摘要: A process for preparing carotenoids, in which the process includes reacting a dialkoxy dialdehyde in a double Wittig condensation with a phosphonium salt of or in a double Wittig-Horner condensation with a phosphonate. The carotenoids include, for example, β-carotene, zeaxanthin, canthaxanthin, astaxathin, lycopene and croceptin, which are useful as nutraceuticals, food colorants, and feed additives.

    摘要翻译: 一种制备类胡萝卜素的方法,其中该方法包括使双维t嗪缩合中的二烷氧基二醛与双维维特 - 霍纳缩合的鏻盐与膦酸酯反应。 类胡萝卜素包括例如β-胡萝卜素,玉米黄质,角黄素,虾青素,番茄红素和croceptin,其可用作营养制品,食品着色剂和饲料添加剂。

    Method for the production of chiral imidazolidin-2-ones
    42.
    发明申请
    Method for the production of chiral imidazolidin-2-ones 失效
    制备手性咪唑烷-2-酮的方法

    公开(公告)号:US20050165078A1

    公开(公告)日:2005-07-28

    申请号:US10510439

    申请日:2003-04-08

    CPC分类号: C07D233/00

    摘要: The invention relates to a process for preparing chiral imidazolidin-2-ones of the formula I in which R1 is C1-C8-alkyl, cyclohexyl, phenyl, a C1-C6-alkyl-, halo-, nitro-, C1-C6-alkoxy-, C1-C6-alkylmercapto- or CF3-substituted phenyl radical, naphthyl or a C1-C6-alkyl-, halo-, nitro-, C1-C6-alkoxy- or CF3-substituted naphthyl radical, R2 is C1-C8-alkyl, C2-C8-alkenyl, cyclohexyl, phenyl or a phenyl-C1-C6-alkyl radical which may be substituted by a nitro, C1-C6-alkoxy, methylenedioxy or CF3 radical, and R3 is C1-C12-alkyl, C2-C8-alkenyl, cyclohexyl, phenyl or a C1-C6-alkyl-, halo-, nitro-, C1-C6-alkoxy-, methylenedioxy-, dialkylamino- or CF3-substituted phenyl radical, by reacting a compound of the formula II or the salt thereof in which R1, R2 and R3 have the abovementioned meaning, with urea in the presence of an involatile ammonium salt, wherein the reaction is carried out in the presence of an aprotic polar organic solvent.

    摘要翻译: 本发明涉及一种制备其中R 1是C 1 -C 8 - 的式I的手性咪唑烷-2-酮的方法, 烷基,环己基,苯基,C 1 -C 6 - 烷基 - ,卤代 - ,硝基 - ,C 1 -C 3 - C 6 - 烷氧基 - ,C 1 -C 6 - 烷基巯基或CF 3 - 取代的苯基,萘基或C C 1 -C 6 - 烷基 - ,卤代 - ,硝基 - ,C 1 -C 6 - 烷氧基 - 或CF 3 - 取代的萘基,R 2是C 1 -C 8 - 烷基,C 和R 3具有上述含义,在非挥发性铵盐存在下用脲进行反应,其中反应在非质子极性有机溶剂的存在下进行。

    Process for preparing 2,7-dimethyl-2,4,6-octatrienal monoacetals
    44.
    发明授权
    Process for preparing 2,7-dimethyl-2,4,6-octatrienal monoacetals 失效
    制备2,7-二甲基-2,4,6-八碳三烯单缩醛的方法

    公开(公告)号:US06610892B2

    公开(公告)日:2003-08-26

    申请号:US10094819

    申请日:2002-03-12

    IPC分类号: C07C4529

    摘要: The invention relates to a process for preparing 2,7-dimethyl-2,4,6-octatrienal monoacetals of the general formula I which comprises a) condensing an ester phosphonium salt of the general formula II or an ester phosphonate of the general formula III with an aldehyde of the formula IV in a Wittig or Wittig-Horner reaction to give an acetal ester of the general formula V b) reducing the ester of the formula V to give an acetal alcohol of the general formula VI and c) oxidizing the alcohol to 2,7-dimethyl-2,4,6-octatrienal monoacetals of the general formula I, where the substituents have the meaning defined in the description.

    摘要翻译: 本发明涉及一种制备通式Ⅰ的2,7-二甲基-2,4,6-辛二烯一缩醛的方法,它包括:a)将通式Ⅱ的酯鏻盐或通式Ⅲ的酯膦酸酯与醛 的维t希或维蒂希 - 霍纳反应,得到通式Ⅴb的缩醛Vb)of of of V V the the the the the--------c c c c c c c c c c c c c 具有通式I的2,4,6-八碳三烯单缩醛,其中取代基具有在说明书中定义的含义。