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    Improved hydrogenation process for preparing 4-aminophenol
    5.
    发明公开
    Improved hydrogenation process for preparing 4-aminophenol 无效
    改进的加氢方法制备4-氨基苯酚

    公开(公告)号：EP0289297A3

    公开(公告)日：1990-05-23

    申请号：EP88303825.9

    申请日：1988-04-28

    申请人： NORAMCO, INC.

    发明人： Kao, James Tzu Fen ,  Raff II, Dwight Everette

    IPC分类号： C07C213/08 ,  C07C215/76

    CPC分类号： C07C215/76

    摘要： The process for the production of 4-aminophenol by reducing nitrobenzene with hydrogen in a reaction zone at an elevated temperature and moderate pressure in the presence of aqueous sulfuric acid, a surfactant and a catalyst, is improved by using a platinum on carbon catalyst; utilizing a reaction zone which is not completely filled so that there is both a vapor space and a lower liquid space in the reaction zone and introducing the hydrogen into the vapor space part of said reaction zone; stirring the reaction mixture vigorously using an impeller placed at 40-60% of liquid depth to attain a rate of hydrogenation resulting in a performance index [expressed as grams 4-aminophenol produced per minute per liter of reaction volume] of 0.2 and higher.

    PROCESS FOR THE PRODUCTION OF CANNABIDIOL AND DELTA-9-TETRAHYDROCANNABINOL
    10.
    发明公开
    PROCESS FOR THE PRODUCTION OF CANNABIDIOL AND DELTA-9-TETRAHYDROCANNABINOL 审中-公开
    生产大麻二酚和δ-9-四氢香芹醇的方法

    公开(公告)号：EP3319952A1

    公开(公告)日：2018-05-16

    申请号：EP16741447.3

    申请日：2016-07-01

    申请人： Noramco, Inc.

    发明人： DIALER, Lukas ,  PETROVIC, Denis ,  WEIGL, Ulrich

    IPC分类号： C07D311/04 ,  C07D311/80

    摘要： The present disclosure relates to the preparation of a cannabidiol compound or a derivative thereof. The cannabidiol compound or derivatives thereof can be prepared by an acid-catalyzed reaction of a suitably selected and substituted di-halo-olivetol or derivative thereof with a suitably selected and substituted cyclic alkene to produce a dihalo-cannabidiol compound or derivative thereof. The dihalo-cannabidiol compound or derivative thereof can be produced in high yield, high stereospecificity, or both. It can then be converted under reducing conditions to a cannabidiol compound or derivatives thereof.