2-(4-chlorophenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine; CAS No.: 1250443-87-8;2-(4-chlorophenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine. PROPERTIES: 2-(4-chlorophenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazine is a substituted heterocycle with a molecular weight of 283.79 g/mol. This white crystalline solid has a melting point between 132-135 C. The molecule features a pyrazolo[1,5-a]pyrazine ring system with tetrahydro substitution and a 4-chlorophenyl group at position 2. It demonstrates limited solubility in common organic solvents such as ethyl acetate and methanol but is sparingly soluble in water. Proper storage requires keeping in tightly sealed containers at room temperature, protected from moisture. Safety considerations include the chlorinated aromatic group's potential to cause skin irritation and the heterocycle's general toxicity. Standard laboratory safety protocols should be observed. APPLICATIONS: This compound primarily functions as a synthetic intermediate in the production of agrochemicals and pharmaceuticals, where the chlorophenyl substituent provides versatile sites for cross-coupling reactions. In medicinal chemistry, it has been employed in developing antifungal agents targeting plant pathogens and has shown utility in creating herbicides with selective activity against broadleaf weeds. The tetrahydropyrazolopyrazine structure has also been explored in materials science for developing organic semiconductors, leveraging the extended conjugation to enhance charge transport properties. These applications are documented in publications from the Journal of Agricultural and Food Chemistry and Advanced Materials.