Amino(5-methyl-2-thienyl)acetic acid(CAS: 89776-66-9)

Amino(5-methyl-2-thienyl)acetic acid is a white to off-white crystalline solid with a molecular weight of approximately 191.19 g/mol. It is slightly soluble in water and has good solubility in organic solvents. The compound exhibits moderate reactivity, particularly towards nucleophilic substitution reactions at the thiophene ring. It is stable under normal conditions but should be protected from strong acids and bases.

Amino(5-methyl-2-thienyl)acetic acid can be synthesized through a multi-step process involving the preparation of the 5-methylthiophene derivative, followed by acylation with an acyl chloride or anhydride. The reaction is catalyzed by a Lewis acid and proceeds with good yield and selectivity. Commonly used catalysts include aluminum chloride or thionyl chloride. The final step involves the nucleophilic substitution of the chloride with ammonia to form the amino derivative.

Amino(5-methyl-2-thienyl)acetic acid finds applications in the pharmaceutical industry for the synthesis of certain drugs, in polymer synthesis as a monomer, and in the development of sensors for detecting various analytes. It is also used in the semiconductor industry as a precursor for organic semiconductor materials.

When handling Amino(5-methyl-2-thienyl)acetic acid, it is essential to wear appropriate personal protective equipment (PPE), including gloves, safety goggles, and a lab coat. The substance should be handled in a well-ventilated area, preferably under a fume hood. Spills should be cleaned up using appropriate absorbent materials, and the area should be well-ventilated until all residues are removed. The material safety data sheet (MSDS) should be consulted for detailed spill and disposal procedures. Storage should be in a cool, dry place away from strong acids and bases.