3-Butyl-4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)thiophen-2-one;4-ethyl-2-methyl-2-(2-methylbuta-1,3-dienyl)-5-methylidenethiophen-3-ol;4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)-3-[4-(4-methylphenyl)butyl]thiophen-2-one;4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)-3-[2-(4-methylphenyl)ethyl]thiophen-2-one;4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)-3-propylthiophen-2-one(CAS: 70131-50-9)

3-Butyl-4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)thiophen-2-one is a crystalline compound with a molecular weight of approximately 289.4 g/mol. It has a solubility in organic solvents like ethanol and acetone but is poorly soluble in water. This compound exhibits low reactivity under normal conditions but can undergo thermal degradation and undergo nucleophilic substitution reactions under specific conditions. It is also susceptible to photochemical decomposition.

3-Butyl-4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)thiophen-2-one is typically synthesized through the condensation of 2-methylbuta-1,3-diene with 4-hydroxy-5-methylthiophen-2-one, followed by a Claisen rearrangement. This process requires the use of a base catalyst, such as sodium hydride, and is carried out under anhydrous conditions. The yield is generally around 70%, and the selectivity is favorable for the desired product.

3-Butyl-4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)thiophen-2-one finds applications in the pharmaceutical industry for its potential as a precursor to drug intermediates. It is also used in the polymer industry as a stabilizer and in the production of functional polymers. Additionally, it can be used in the production of sensors and semiconductors due to its unique chemical properties.

When handling 3-Butyl-4-hydroxy-5-methyl-5-(2-methylbuta-1,3-dienyl)thiophen-2-one, it is essential to use appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. This compound should be stored in a cool, dry place away from direct sunlight and flammable materials. In case of a spill, it should be contained and disposed of according to local regulations. Always consult the Safety Data Sheet (SDS) for specific handling guidelines and emergency procedures.