Continuous processes for the hydrolysis of cyanopyridines under
substantially adiabatic conditions
    1.
    发明授权
    Continuous processes for the hydrolysis of cyanopyridines under substantially adiabatic conditions 失效
    在基本绝热条件下水解氰基吡啶的连续方法

    公开(公告)号:US5756750A

    公开(公告)日:1998-05-26

    申请号:US798313

    申请日:1997-02-07

    CPC分类号: C07D213/803 C07D213/81

    摘要: Described are preferred processes for hydrolyzing substituted and unsubstituted cyanopyridines in the presence of a base and under substantially adiabatic conditions to produce pyridine substituted amides and/or pyridine substituted carboxylic acids. Preferred processes can be conducted in a variety of continuous reactors including cascades of reaction vessels, loop reactors or flow tube reactors. More preferred are the efficient and advantageous preparations of nicotinamide and niacin, which serve as important members of the B-vitamin complex.

    摘要翻译: 描述了在碱存在下和基本绝热条件下水解取代和未取代的氰基吡啶的优选方法,以产生吡啶取代的酰胺和/或吡啶取代的羧酸。 优选的方法可以在各种连续反应器中进行,包括级联的反应容器,环管反应器或流动管式反应器。 更优选的是作为B维生素复合物的重要成员的烟酰胺和烟酸的有效和有利的制剂。