Green approach for the synthesis of 4-coumarin-4<i>H</i>-pyrans from 4-formylcoumarins and their antibacterial study

<p>A series of 4<i>H</i>-pyranocoumarin derivatives have been successfully synthesized under eco-friendly condition using triethylamine as a catalyst in short reaction time with excellent yield at room temperature. All the synthesized compounds were characterized by spectral analysis and screened for their antibacterial activity against <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>, the results are quite promising.</p

Synthesis of coumarin analogous of decursivine derivatives

<p>The first synthesis of decursivine derivatives of coumarins is described via intramolecular Friedel–Craft aromatic alkylation. The Lewis acid (LA)–catalyzed reaction facilitated the rapid construction of the desired product. The targeted molecule obtained has been confirmed by spectral analysis.</p