3-(Bromoacetyl)-5-chloro-2-thiophenesulfonamide(CAS: 160982-11-6)

3-(Bromoacetyl)-5-chloro-2-thiophenesulfonamide is a white to off-white crystalline solid with a molecular weight of approximately 350.04 g/mol. It is sparingly soluble in water and readily soluble in organic solvents like ethanol and acetone. The compound is reactive, showing electrophilic aromatic substitution chemistry and nucleophilic substitution at the bromoacetyl and thiophene rings. It is stable under normal conditions but should be stored in a dry environment away from moisture and light.

3-(Bromoacetyl)-5-chloro-2-thiophenesulfonamide can be synthesized through a multi-step reaction involving thiophene sulfonamide formation followed by bromoacetylation. Commonly, thiophene sulfonamide is prepared by reacting thiophene with sodium hydrosulfite in an aqueous medium, followed by acetylation with acetyl chloride in the presence of a base like pyridine. The resulting acetylated intermediate is then brominated using bromine in the presence of a Lewis acid like aluminum bromide to introduce the bromoacetyl group.

3-(Bromoacetyl)-5-chloro-2-thiophenesulfonamide is primarily used in the pharmaceutical industry for the synthesis of certain drugs, particularly those targeting metabolic pathways. It also finds applications in the development of novel sensors and semiconductors due to its unique chemical properties. Additionally, it may be used in the polymer industry for specific functionalization and modification of polymers.

When handling 3-(Bromoacetyl)-5-chloro-2-thiophenesulfonamide, it is crucial to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work should be conducted in a fume hood to minimize exposure to vapors. Spills should be cleaned up carefully using absorbent materials. The material safety data sheet (MSDS) should be consulted for detailed safety information and emergency procedures. The compound should be stored in a cool, dry place away from direct sunlight and sources of ignition.