*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p><strong>2-(3-chloro-pyridin-2-yl)-5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylic acid ethyl ester</strong> (CAS: 1207864-93-2) is a key heterocyclic intermediate with formula C12H11ClN2O3. Synthesized via condensation of ethyl acetoacetate and hydrazine derivatives, it serves as a critical scaffold for pharmaceutical development.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical synthesis: Precursor for kinase inhibitors and antiviral agents.</li>
<li>Agrochemicals: Building block for pyrazole-based fungicides and herbicides.</li>
<li>Material science: Used in developing specialized optical brighteners.</li>
</ul>
<h3>Precautions</h3>
<ul>
<li>Store under inert atmosphere at 2-8°C to prevent hydrolysis.</li>
<li>Handle with PPE; avoid inhalation or skin contact due to potential irritancy.</li>
<li>Not approved for direct clinical use; strictly for industrial R&D applications only.</li>
</ul>