Methyl 5-chloropyrazolo[1,5-a]pyrimidine-2-carboxylate(CAS: 1263059-26-2)

Methyl 5-chloropyrazolo[1,5-a]pyrimidine-2-carboxylate is a white crystalline solid with a molecular weight of approximately 285.03 g/mol. It is slightly soluble in water but highly soluble in organic solvents like ethanol and acetonitrile. This compound is known for its moderate reactivity, particularly towards nucleophilic substitution reactions. It exhibits a high melting point, suggesting a crystalline form that is stable under normal laboratory conditions.

Methyl 5-chloropyrazolo[1,5-a]pyrimidine-2-carboxylate is synthesized through a multi-step process involving the condensation of 1-chloropyrazole with methyl pyrimidine-2-carboxylate. The reaction typically proceeds with a Lewis acid catalyst such as aluminum chloride to promote the electrophilic aromatic substitution. The yield of the product is usually around 75-85%, and the method is known for its high selectivity and good reproducibility.

Methyl 5-chloropyrazolo[1,5-a]pyrimidine-2-carboxylate is used in the pharmaceutical industry for the synthesis of complex molecules and as an intermediate in drug development. It also has potential applications in the polymer industry for its potential use in developing new materials with specific properties. Additionally, it can be utilized in the sensor and semiconductor industries due to its electronic properties.

When handling Methyl 5-chloropyrazolo[1,5-a]pyrimidine-2-carboxylate, it is essential to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. It should be handled in a well-ventilated area or a fume hood to minimize exposure to the air. Spills should be cleaned up immediately using appropriate absorbent materials, and the area should be thoroughly washed down. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal information.