Process Development of the RIPK1 Inhibitor Oditrasertib Part 1: Continuous Synthesis of the Pyridine Core

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Continuous flow
Crystallization
Process development

In a recent study coauthored by Sanofi and members of our Snapdragon Chemistry team, we describe the synthesis of the investigational RIPK1 inhibitor oditrasertib (DNL788, SAR443820) and demonstrate how continuous flow chemistry and process optimization can significantly improve pharmaceutical manufacturing efficiency. Our researchers developed a telescoped three-step synthetic route that integrates continuous processing with a single crystallization step to produce a high-purity bromopyridine intermediate in 68% overall yield and greater than 99.5% purity.

The work highlights several important process chemistry innovations, including the use of continuous flow manufacturing to streamline reaction sequencing, reduce operational complexity and improve process throughput compared to traditional batch manufacturing methods. By telescoping multiple synthetic steps into a single continuous operation, the process minimizes intermediate handling while supporting improved scalability and manufacturing consistency.

For pharmaceutical companies developing complex small molecule therapies, this approach demonstrates the practical value of modern continuous manufacturing strategies for RIPK1 inhibitor development and API process optimization. The study reinforces how advanced process chemistry, integrated crystallization techniques and continuous flow technologies can accelerate development timelines while enhancing product quality, operational efficiency and commercial manufacturing readiness.

To learn more about this program, please read the full article in Organic Process Research & Development.

View the full article (via ACS Publications)