The present invention relates to an improved, cost effective and easy process for the preparation of azithromycin monohydrate isopropanol clathrate. The process provides a one-step method of preparing azithromycin monohydrate isopropanol clathrate directly from 9-deoxo-9a-aza-9a-homoerythromycin A. The process comprises at least partial dissolution and/or suspension of 9-deoxo-9a-aza-9a homoerythromycin A in isopropanol to form a mixture, adding methylating solution to the said mixture, refluxing or heating said mixture to form a reaction mixture, adding alkaline solution to the reaction mixture to adjust pH from about 10 to about 11 and isolating pure azithromycin monohydrate isopropanol clathrate. The process helps in reducing the total time of preparation, total utility cost for the production and also helps to avoid handling loss.
本发明涉及一种制备一
水阿奇霉素异丙醇包合物的改进型、低成本、简便的工艺。该工艺提供了一种由 9-脱氧-9a-aza-9a-高
红霉素 A 直接制备一
水阿奇霉素异丙醇凝块的一步法。该工艺包括将 9-脱氧-9a-aza-9a-高
红霉素 A 至少部分溶解和/或悬浮于
异丙醇中以形成混合物,向所述混合物中加入甲基化溶液,回流或加热所述混合物以形成反应混合物,向反应混合物中加入碱性溶液以调节 pH 值从约 10 到约 11,并分离出纯的一
水阿奇霉素异丙醇凝块。该工艺有助于减少制备的总时间,降低生产的总实用成本,还有助于避免处理损失。