3-(Difluoromethyl)-1-methyl-1H-pyrazole-4-carboxylic acid (CAS No. 176969-34-9), also known as difluoropyrazole acid, is a versatile chemical intermediate widely used in the synthesis of pharmaceuticals, agrochemicals, and specialty materials. Its primary applications include:
- Pharmaceutical Intermediates:
- Serves as a key precursor for synthesizing antifungal agents, such as pyrazole-amide fungicides (e.g., fluxapyroxad, bixafen, and isopyrazam), which belong to the SDHI (succinate dehydrogenase inhibitors) class of fungicides.
- Utilized in the development of anticancer drugs, anti-inflammatory agents, and other therapeutic compounds.
- Agrochemicals:
- Acts as an essential building block for pesticides, herbicides, and fungicides, leveraging its reactivity in forming stable complexes with biological targets.
- Material Science:
- Contributes to the synthesis of dyes, pigments, and advanced materials with tailored optical or electronic properties.
Physical and Chemical Properties
| Property | Details |
|---|---|
| CAS No. | 176969-34-9 |
| Molecular Formula | C₆H₆F₂N₂O₂ |
| Molecular Weight | 176.12 g/mol |
| Appearance | White to off-white crystalline powder |
| Melting Point | 203–206°C |
| Boiling Point | 315.9°C at 760 mmHg |
| Density | 1.52 g/cm³ |
| Solubility | Soluble in organic solvents (e.g., DMSO, ethanol); slightly soluble in water |
| Purity | Typically ≥98% (industrial grade) or ≥99% (pharmaceutical grade) |
Key Applications in Detail
- Fungicide Synthesis: Its role in SDHI fungicides is critical due to its ability to inhibit succinate dehydrogenase, disrupting fungal energy metabolism.
- Drug Development: The compound’s reactivity and structural flexibility make it suitable for incorporating into drug candidates targeting various diseases.
- Industrial Applications: Beyond agrochemicals, it finds use in specialty chemical synthesis, including the production of high-performance materials and pigments.
This compound’s unique properties and broad applicability underscore its importance in modern chemical and pharmaceutical industries.
