Ethyl Pyrazole-4-carboxylate丨CAS 37622-90-5

Ethyl pyrazole-4-carboxylate is a versatile heterocyclic intermediate widely used in pharmaceutical, agrochemical, and fine chemical synthesis. Its pyrazole core is a privileged scaffold in medicinal chemistry, commonly incorporated into compounds with anti-inflammatory, antiviral, anticancer, and antimicrobial activity. The ester functionality at the 4-position allows for a range of chemical transformations, such as hydrolysis, amidation, and condensation, enabling the preparation of carboxylic acids, amides, hydrazides, and other functional derivatives. It serves as a building block for synthesizing pyrazole-based drugs, enzyme inhibitors, and bioactive molecules, as well as intermediates in agrochemical research for herbicides and fungicides. Additionally, it is used in research and development to explore structure–activity relationships (SAR) and develop novel heterocyclic compounds with optimized pharmacological properties.

Ethyl pyrazole-4-carboxylate offers significant advantages due to its chemical reactivity, structural versatility, and stability. The pyrazole ring provides a rigid, biologically relevant scaffold that can enhance binding specificity and metabolic stability in target molecules. The ethyl ester group facilitates selective functionalization and protects the carboxylic acid during multi-step synthesis, allowing efficient downstream derivatization. Its solubility in common organic solvents and compatibility with standard reaction conditions make it suitable for both laboratory and industrial-scale synthesis. The compound's high purity and reproducible behavior support consistent synthesis of analogs, making it an efficient intermediate for medicinal chemistry and agrochemical applications.