ethyl 6H-thieno[2,3-b]pyrrole-5-carboxylate; CAS No.: 35357-56-3; ethyl 6H-thieno[2,3-b]pyrrole-5-carboxylate. PROPERTIES: ethyl 6H-thieno[2,3-b]pyrrole-5-carboxylate is a crystalline solid. Its molecular formula is C9H9NO2S, and the molecular weight is approximately 203.24 g/mol. The compound has a melting point of approximately 90-92 C. It is moderately soluble in common organic solvents such as ethyl acetate and tetrahydrofuran, but is poorly soluble in water. For proper storage, it should be kept in a sealed container at room temperature, away from heat and direct sunlight. As a compound containing a thieno[2,3-b]pyrrole ring and an ester group, it may exhibit certain reactivity and stability. When handling it, protective gloves and eye protection should be worn. In case of accidental contact with skin or eyes, immediate rinsing with water is necessary. APPLICATIONS: In organic synthesis, ethyl 6H-thieno[2,3-b]pyrrole-5-carboxylate serves as a versatile intermediate. The ester group can be hydrolyzed to a carboxylic acid. The thieno[2,3-b]pyrrole ring provides unique electronic effects. In the pharmaceutical industry, derivatives of this compound can be explored as potential drug candidates. For instance, in the development of certain antimicrobial agents, the structure of ethyl 6H-thieno[2,3-b]pyrrole-5-carboxylate can be modified to enhance the drug's antimicrobial activity and selectivity (as reported in medicinal chemistry journals). Additionally, in the field of materials science, it can be incorporated into the synthesis of functional materials such as liquid crystals or organic semiconductors, where its structure can influence the material's electronic and optical properties (as noted in materials chemistry research papers).