<a href="https://en.wikipedia.org/wiki/Skeletal_structure" class="extiw" title="en:Skeletal structure">Skeletal structures</a> for the synthesis of <a href="https://en.wikipedia.org/wiki/bromisoval" class="extiw" title="en:bromisoval">bromisoval</a>. <a href="https://en.wikipedia.org/wiki/Isovaleric_acid" class="extiw" title="en:Isovaleric acid">Isovaleric acid</a> undergoes a <a href="https://en.wikipedia.org/wiki/Hell%E2%80%93Volhard%E2%80%93Zelinsky_reaction" class="extiw" title="en:Hell–Volhard–Zelinsky reaction">Hell–Volhard–Zelinsky reaction</a> using <a href="https://en.wikipedia.org/wiki/phosphorus_tribromide" class="extiw" title="en:phosphorus tribromide">phosphorus tribromide</a>. The <a href="https://en.wikipedia.org/wiki/acyl_halide" class="extiw" title="en:acyl halide">acyl halide</a> then undergoes a <a href="https://en.wikipedia.org/wiki/condensation_reaction" class="extiw" title="en:condensation reaction">condensation reaction</a> with <a href="https://en.wikipedia.org/wiki/urea" class="extiw" title="en:urea">urea</a>.
<a href="//commons.wikimedia.org/wiki/User:DMacks" title="User:DMacks">DMacks</a> (<a href="//commons.wikimedia.org/wiki/User_talk:DMacks" title="User talk:DMacks"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span>