Reducing or eliminating organic solvent use in pharmaceutical manufacturing is perhaps the most effective way to reduce the environmental, health, and safety impacts of drug substance manufacturing. With this in mind, we have developed a process to manufacture an investigational 5-HT₄ receptor agonist that is conducted almost entirely in water, including multiple controlled isolations. Key transformations carried out in aqueous media include a benzimidazole cyclization, amide bond formation, reductive amination, and a selective oxidation of an aliphatic alcohol. Compared to the first-generation manufacturing process using organic solvents, the aqueous process described here uses 77% less material inputs, 94% less organic solvent, and, surprisingly, 48% less water, while improving overall yield from 35% to 56%.

中文翻译：

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超越有机溶剂：在水中合成5-HT4受体激动剂

减少或消除药物生产中使用有机溶剂可能是减少药物生产对环境，健康和安全影响的最有效方法。考虑到这一点，我们已经开发出一种制造可研究的5-HT ₄受体激动剂的方法，该方法几乎完全在水中进行，包括多重控制分离。在水性介质中进行的关键转化包括苯并咪唑环化，酰胺键形成，还原胺化和脂族醇的选择性氧化。与使用有机溶剂的第一代制造工艺相比，此处描述的水性工艺使用的材料输入量减少了77％，有机溶剂减少了94％，令人惊讶的是，水使用量减少了48％，同时将总产率从35％提高到56％。