3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one(CAS: 5439-14-5)

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one is a crystalline solid with a molecular weight of approximately 135.14 g/mol. It has a melting point of around 150-152°C. Soluble in common organic solvents like DMSO and acetonitrile. It is moderately reactive, showing good stability in acidic and neutral conditions but is sensitive to strong bases. It can form complexes with metal ions effectively.

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one can be synthesized via multistep reactions involving the condensation of a pyridine derivative with a hydrazine derivative. Common synthesis methods include the condensation of 2-cyano-3,4-dihydro-2H-pyrido[1,2-a]pyrimidin-2-one with hydrazine hydrate in the presence of a catalyst such as hydrochloric acid, followed by dehydration under appropriate conditions to yield the target compound with high selectivity and yield.

3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one finds applications in the pharmaceutical industry for the development of antiviral and antibacterial drugs. It is also used in polymer science for the synthesis of functional polymers with specific properties. Additionally, it plays a role in sensor technology and semiconductor manufacturing due to its unique chemical structure and reactivity.

Proper handling of 3,4-Dihydro-2H-pyrido[1,2-a]pyrimidin-2-one requires the use of personal protective equipment (PPE) such as gloves, safety goggles, and a lab coat. It should be handled in a well-ventilated area or a fume hood to avoid inhalation. Spills should be handled with care, using suitable absorbent materials, and the area should be cleaned with appropriate solvents. Always refer to the Safety Data Sheet (SDS) for detailed handling and safety information.