Avatrombopag Impurity 8(CAS: 570407-42-0)

Avatrombopag Impurity 8 is a crystalline solid with a molecular weight of approximately 419.45 g/mol. It has a low solubility in water but is more soluble in organic solvents like ethanol and acetonitrile. The impurity is chemically reactive and can undergo ring-opening reactions under basic conditions. It is less stable compared to the parent compound, making it important to store under an inert atmosphere to prevent degradation.

Avatrombopag Impurity 8 is synthesized through a multi-step process involving Friedel-Crafts alkylation and subsequent ring-opening reactions. Common catalysts include Lewis acids such as aluminum chloride. The synthetic route produces a high yield of the desired impurity with good selectivity. However, the process requires careful control of reaction conditions to avoid formation of undesired by-products.

Avatrombopag Impurity 8 is primarily used in the pharmaceutical industry, where it is a by-product or impurity in the synthesis of the antifibrinolytic agent avatrombopag. It plays a role in pharmacokinetic and safety studies of the parent drug. Additionally, it may be used in research and development for drug metabolism and toxicity studies.

When handling Avatrombopag Impurity 8, it is essential to use appropriate personal protective equipment (PPE) such as gloves, safety goggles, and a lab coat. Work should be conducted in a well-ventilated fume hood to minimize inhalation risks. Spills should be cleaned up immediately using appropriate absorbents and waste should be disposed of according to local regulations. Always consult the Safety Data Sheet (SDS) for detailed information on handling and storage.