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    Home > Active Ingredient News > Drugs Articles > The Production Process of 6-chloro-4-methyl-2H-pyridazin-3-one

    The Production Process of 6-chloro-4-methyl-2H-pyridazin-3-one

    • Last Update: 2023-04-26
    • Source: Internet
    • Author: User
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    6-Chloro-4-methyl-2H-pyridazin-3-one, also known as Moclobemide, is an anti-depressant medication that is widely used to treat depression and related disorders.
    The production process of Moclobemide involves several steps, including chemical reactions, isolation, and purification.
    In this article, we will take a closer look at the production process of Moclobemide and the challenges that are associated with its manufacture.


    1. Preparation of 4-chloro-2H-pyridazin-3-one:

    The first step in the production process of Moclobemide involves the preparation of 4-chloro-2H-pyridazin-3-one.
    This compound is prepared by reacting 2-(chloromethyl)-5,6-dihydroimidazo[1,2-d][1,4]benzoxazepine with 2H-pyridazin-3-one in the presence of a solvent, such as acetonitrile or DMF.
    The reaction is carried out at a temperature of around 80-100 °C and the product is isolated by filtration and washing with water.


    1. Nitration of 4-chloro-2H-pyridazin-3-one:

    The next step in the production process of Moclobemide involves the nitration of 4-chloro-2H-pyridazin-3-one.
    This is done by reacting the compound with nitric acid in the presence of a solvent, such as acetonitrile or DMF.
    The reaction is carried out at a temperature of around 70-80 °C and the product is isolated by filtration and washing with water.


    1. Halogenation of 4-nitro-2H-pyridazin-3-one:

    The next step in the production process of Moclobemide involves the halogenation of 4-nitro-2H-pyridazin-3-one.
    This is done by reacting the compound with chlorine in the presence of a solvent, such as acetonitrile or DMF.
    The reaction is carried out at a temperature of around 0-10 °C and the product is isolated by filtration and washing with water.


    1. Reduction of 4-methyl-2H-pyridazin-3-one:

    The final step in the production process of Moclobemide involves the reduction of 4-methyl-2H-pyridazin-3-one.
    This is done by reacting the compound with lithium aluminum hydride (LAH) in the presence of an organic solvent, such as ether or THF.
    The reaction is carried out at a temperature of around 80-90 °C and the product is isolated by filtration and washing with water.


    1. Purification of Moclobemide:

    After the reduction step, the product is further purified by recrystallization in a suitable solvent, such as ethanol or methanol.
    The purified product is then dried and milled into a fine powder, which is ready for use as a pharmaceutical ingredient or further processing into a finished medication.


    In conclusion, the production process of Moclobemide involves several chemical reactions and purification steps.
    The process requires the use of hazardous chemicals and is associated with a number of challenges, such as ensuring the safety of workers and the environment, controlling costs, and maintaining quality.
    These challenges can be addressed through the use of advanced technologies, such as continuous processing and closed-loop control systems, which can improve efficiency and reduce waste.
    Overall, the production of Moclobemide is a complex and challenging process that requires careful attention to detail and a strong commitment to safety and quality.


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