5-Methyl-1,4-dihydro-7H-pyrazolo[4,3-b]pyridin-7-one(CAS: 94220-37-8)

5-Methyl-1,4-dihydro-7H-pyrazolo[4,3-b]pyridin-7-one is a white crystalline solid with a molecular weight of approximately 247.24 g/mol. It is slightly soluble in water and more soluble in organic solvents like methanol and ethanol. The compound is relatively stable but can undergo hydrolysis under acidic conditions. It shows reactivity towards nucleophiles and electrophiles, making it useful in organic synthesis and medicinal chemistry.

5-Methyl-1,4-dihydro-7H-pyrazolo[4,3-b]pyridin-7-one can be synthesized via a multistep process involving the condensation of a pyrazole derivative with an appropriate aldehyde or ketone. Common synthetic methods include using a catalytic amount of a Lewis acid such as aluminum chloride or a boron trifluoride etherate. The reaction typically proceeds with a yield of about 70-85%, depending on the purity of starting materials and reaction conditions.

5-Methyl-1,4-dihydro-7H-pyrazolo[4,3-b]pyridin-7-one has applications in the pharmaceutical industry for synthesizing various drug candidates due to its biological activities. It is also used in the development of sensors and semiconductors due to its electronic properties. Additionally, it can be employed in polymer synthesis and as a reagent in organic chemistry.

When handling 5-Methyl-1,4-dihydro-7H-pyrazolo[4,3-b]pyridin-7-one, it is essential to use appropriate personal protective equipment (PPE) such as gloves, safety goggles, and lab coats. This compound should be handled in a well-ventilated area or a fume hood. Spills should be cleaned up immediately using appropriate absorbent materials, and the area should be flushed with water. Always consult the material safety data sheet (MSDS) for detailed safety information and emergency procedures.