Method for preparing norbornene and substituted derivatives of norbornene
    1.
    发明授权
    Method for preparing norbornene and substituted derivatives of norbornene 失效
    降冰片烯的降冰片烯和取代衍生物的制备方法

    公开(公告)号:US06294706B1

    公开(公告)日:2001-09-25

    申请号:US09142806

    申请日:1998-10-29

    IPC分类号: C07C250

    摘要: Disclosed is a method for the preparation of norbornene and substituted norbornene compounds via a Diels-Alder reaction, in which a cyclic diene is reacted with an olefinic compound in order to prepare a norbornene compound. According to the invention a cyclic diene is gradually added to react with an olefinic compound, in order to keep the concentration of the cyclic diene in the reaction mixture as low as possible during the reaction. It is possible to obtain a very pure product, high yield, short reaction time and high concentrations of the exo diastereomer with the method of the invention.

    摘要翻译: 公开了通过Diels-Alder反应制备降冰片烯和取代的降冰片烯化合物的方法,其中环状二烯与烯属化合物反应以制备降冰片烯化合物。 根据本发明,逐渐加入环状二烯与烯烃化合物反应,以便使反应混合物中的环状二烯的浓度尽可能地低。 用本发明的方法可以获得非常纯的产物,高产率,短的反应时间和高浓度的非对映异构体。

    Process for preparing cyclic monomers
    3.
    发明授权
    Process for preparing cyclic monomers 失效
    制备环状单体的方法

    公开(公告)号:US06566570B1

    公开(公告)日:2003-05-20

    申请号:US09601647

    申请日:2000-08-04

    IPC分类号: C07C276

    摘要: A process for producing an unsaturated cyclic compound, comprising the steps of hydrochlorinating a terpene to produce a hydrochlorinated terpene, and subjecting the hydrochlorinate terpene to elimination of hydrogen chloride to form an unsaturated cyclic compound. The terpene is preferably &agr;-pinene, &bgr;-pinene, camphene or suitable turpentine fraction. The cyclic compounds can be used as monomers and by means of the invention it is thus possible to produce plastics from renewable raw material sources.

    摘要翻译: 一种制备不饱和环状化合物的方法,包括氢化萜烯以产生氢氯化萜烯的步骤,并使氢氯化萜烯消除氯化氢以形成不饱和环状化合物。 萜烯优选为α-蒎烯,β-蒎烯,camp烯或合适的松节油。 环状化合物可以用作单体,通过本发明,可以从可再生原料来源生产塑料。