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(2S,4R)-4-methylpyrrolidine-2-carboxylic acid hydrochloride; CAS No.: 365280-18-8; (2S,4R)-4-methylpyrrolidine-2-carboxylic acid hydrochloride. PROPERTIES: This compound appears as a white to off-white crystalline solid with molecular formula C6H12N2O2 {HCl and a molecular weight of 176.63 g/mol. It exhibits a melting point in the range of 188-192 C and demonstrates good solubility in water and common polar solvents like methanol. The substance is hygroscopic and should be stored in dry conditions. Recommended storage involves maintaining in tightly sealed containers at room temperature with protection from moisture and light. When handling, standard laboratory safety protocols should be observed, including the use of gloves and eye protection, as (2S,4R)-4-methylpyrrolidine-2-carboxylic acid hydrochloride may cause skin and eye irritation. The carboxylic acid group requires careful handling in strongly basic environments. APPLICATIONS: In the pharmaceutical industry, (2S,4R)-4-methylpyrrolidine-2-carboxylic acid hydrochloride serves as an intermediate for synthesizing non-steroidal anti-inflammatory drugs (NSAIDs), as described in medicinal chemistry literature focusing on pyrrolidine derivatives. Its methyl substituent enables improved solubility in biological systems for enhanced bioavailability. Additionally, this compound functions as a building block for preparing agrochemicals with fungicidal activities through coupling reactions. Academic research has explored its potential in metal coordination chemistry for creating luminescent sensors, as reported in inorganic chemistry journals. The pyrrolidine ring system also facilitates formation of metal-organic frameworks (MOFs), making it valuable for gas storage applications in materials science, as evidenced by studies in crystallography publications.