7-(tert-butyl) 3-ethyl 2-amino-5,6-dihydrothieno[2,3-b]pyridine-3,7(4H)-dicarboxylate; CAS No.: 1101857-21-9; 7-(tert-butyl) 3-ethyl 2-amino-5,6-dihydrothieno[2,3-b]pyridine-3,7(4H)-dicarboxylate. PROPERTIES: 7-(tert-butyl) 3-ethyl 2-amino-5,6-dihydrothieno[2,3-b]pyridine-3,7(4H)-dicarboxylate appears as a white to off-white crystalline powder with a slight odor. Its molecular formula is C15H21N2O4S, corresponding to a molecular weight of approximately 335.4 g/mol. The compound exhibits a melting point in the range of 150-153 C and demonstrates moderate solubility in common organic solvents such as methanol, ethyl acetate, and dichloromethane while being sparingly soluble in water. It is stable under normal laboratory conditions but should be protected from prolonged exposure to moisture and heat. Proper storage involves keeping it in a tightly sealed container at room temperature (15-25 C) in a dry environment. Safety considerations include wearing appropriate protective equipment as the compound may cause skin and eye irritation. Inhalation of dust should be avoided, and in case of accidental exposure, thorough washing with water and medical consultation is advised. APPLICATIONS: 7-(tert-butyl) 3-ethyl 2-amino-5,6-dihydrothieno[2,3-b]pyridine-3,7(4H)-dicarboxylate serves as a specialized intermediate in the synthesis of pharmaceuticals, particularly valuable in the preparation of certain antiviral and anticancer agents. Its thienopyridine and amino groups provide structural features important for receptor binding and bioactivity. In materials science, it functions as a building block for creating coordination polymers and metal-organic frameworks, where its carboxylate groups enable the formation of stable coordination bonds with metal ions. Additionally, it finds application in the development of fluorescent probes for bioimaging, where its thieno structure allows for selective labeling of biological targets. The compound is also employed in the synthesis of agrochemicals, though specific applications in this area are limited to non-agricultural research settings.