3,4-Difluorophenol

3,4-Difluorophenol丨CAS 2713-33-9 is a fluorinated aromatic compound featuring a phenol ring substituted with fluorine atoms at the 3 and 4 positions. The presence of the electron-withdrawing fluorine atoms significantly modifies the reactivity, acidity, and lipophilicity of the phenol group, making it an important intermediate in medicinal chemistry and fine chemical synthesis.

1. Pharmaceutical Intermediate

Widely used in the synthesis of active pharmaceutical ingredients (APIs) and bioactive compounds.

The difluoro substitution enhances metabolic stability and binding affinity in drug candidates.

Acts as a precursor or building block in the preparation of anti-inflammatory, antiviral, or oncological agents.

2. Agrochemical Synthesis

Used in the design and manufacture of herbicides, fungicides, and insecticides.

The fluorinated phenol core improves the environmental persistence and biological activity of agrochemicals.

3. Organic Synthesis

Serves as a key electrophilic aromatic intermediate.

Used in nucleophilic aromatic substitution (SNAr) reactions and cross-coupling reactions (e.g., Suzuki, Buchwald-Hartwig).

Can be further functionalized at the phenol or aromatic positions for advanced synthetic routes.

4. Material Science

Used in the synthesis of fluorinated polymers or resins where chemical resistance, thermal stability, and hydrophobicity are needed.

Acts as a monomer or additive for specialty coatings and electronic materials.

Fluorine substitution increases lipophilicity, electron-withdrawing effect, and stability.

Provides access to a wide range of functionalized aromatic compounds.

The phenol group offers reactive flexibility (e.g., etherification, esterification, coupling).

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