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3-Cyclopropyl-2-propenoic acid ethyl ester; CAS No.: 5808-99-1; 3-Cyclopropyl-2-propenoic acid ethyl ester. PROPERTIES: This compound is a 3-Cyclopropyl-2-propenoic acid ethyl ester appearing as colorless liquid. Its molecular weight is approximately 162.21 g/mol. It has characteristic mild ester odor. The compound is moderately soluble in common organic solvents like ether and chloroform. It shows good stability under normal conditions but may undergo polymerization upon exposure to heat. Store in tightly sealed containers below 30 C. Protect from heat and direct sunlight. Handle with care using appropriate protective gloves to prevent skin contact. APPLICATIONS: 3-Cyclopropyl-2-propenoic acid ethyl ester is utilized in organic synthesis as cyclopropylpropenoate building block as detailed in Synthetic Communications. It's employed in preparation of certain macrolide antibiotics mentioned in Journal of Antibiotics. Additionally, this compound serves as intermediate for synthesizing cyclopropyl-containing pharmaceuticals reported in Organic & Biomolecular Chemistry. The ester group provides valuable site for hydrolysis in prodrug activation mechanisms.