_:nc52e785faeb74740ba6e93c49ddf5cf9xb33
<http://schema.org/text>
"<p>In malonic ester and acetoacetic ester syntheses, the decarboxylation step involves a pericyclic reaction where the &beta;-keto acid intermediate undergoes the expulsion of carbon dioxide CO<sub>2</sub>&nbsp;to form an enol intermediate. This enol then tautomerizes to produce the corresponding keto form, resulting in malonic acid in malonic ester synthesis and acetoacetic acid in acetoacetic ester synthesis.</p>"
<https://chemistry.coach/organic-chemistry-3/enols-enolates-and-aldol-condensation>