4-Bromo-5-methyl-3-(trifluoromethyl)-1H-pyrazole(CAS: 60061-68-9)

4-Bromo-5-methyl-3-(trifluoromethyl)-1H-pyrazole is a crystalline compound with a molecular weight of approximately 267.01 g/mol. It is poorly soluble in water but soluble in organic solvents like ethanol and acetone. The compound is known for its high reactivity, particularly towards nucleophilic substitution reactions. It also exhibits strong electrophilic character due to the presence of the trifluoromethyl group.

4-Bromo-5-methyl-3-(trifluoromethyl)-1H-pyrazole is commonly synthesized via the reaction of 5-methyl-3-(trifluoromethyl)-1H-pyrazole with bromine in the presence of a base such as potassium carbonate. The reaction is carried out in a solvent like acetonitrile, and the yield is typically around 75-80%. Selectivity and purity can be improved by using appropriate purification techniques.

4-Bromo-5-methyl-3-(trifluoromethyl)-1H-pyrazole finds applications in the pharmaceutical industry for the synthesis of drug candidates. It is also used in the polymer industry as a precursor for fluorinated polymers. Additionally, the compound is utilized in the development of sensors and as a building block for semiconductors due to its unique electronic properties.

When handling 4-Bromo-5-methyl-3-(trifluoromethyl)-1H-pyrazole, it is essential to wear appropriate personal protective equipment (PPE) including gloves, lab coat, and safety goggles. The compound should be stored in a cool, dry place, away from direct sunlight and sources of ignition. In case of a spill, it should be handled using a fume hood to minimize exposure. For detailed safety information, refer to the safety data sheet (SDS) and follow proper laboratory safety guidelines.