Synthesis of
<scp>2‐amino‐4</scp>
<i>H</i>
‐chromenes and spirochromenes using basic ionic liquid, 2‐hydroxyethylammonium formate as green, stable, and reusable catalyst
2-amino-4H-chromenes and spirochromenes were fabricated in a one-pot three-component synthesis manner from commercially available chemicals including phloroglucinol, malononitrile, and aldehydes/isatines with acceptable and easy efficiencies. This methodology was performed in the presence of 2-hydroxyethylammonium formate as an effective and reusableionicliquidcatalyst. Water was selected as the
Facile one‐pot three‐component route to an assembly of
<scp>
2‐amino‐4
<i>H</i>
</scp>
‐chromenes and spirochromenes promoted via ceria nanoparticles in a benign manner
In this study, a series of 2-amino-4H-chromenes and spirochromenes were elaborated and synthesized via a new sustainable one-pot three-component strategy from easily available materials including phloroglucinol, malononitrile, and aldehydes/isatins. Ceria nanoparticles (CeO2 NPs) were successfully applied as an effective catalyst that recycled and reused with a marginal decrement in its catalytic performance