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<h3>Overview</h3>
<p>Methyl 5-formylthiophene-3-carboxylate (CAS <strong>100689-47-2</strong>) is a heterocyclic building block with formula <strong>C<sub>7</sub>H<sub>6</sub>O<sub>3</sub>S</strong>. Synthesized via Vilsmeier-Haack formylation of methyl thiophene-3-carboxylate, it serves as a critical intermediate for pharmaceuticals and agrochemicals.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical synthesis: Precursor for anti-inflammatory drugs and kinase inhibitors.</li>
<li>Agricultural chemicals: Used in developing novel herbicides and fungicides.</li>
<li>Material science: Component in conducting polymer research and OLED emitters.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C to prevent oxidation. Use PPE due to skin irritation risks; avoid inhalation of vapors. Not approved for direct clinical use without further derivatization.</p>