K₂CO₃-Promoted oxy-Michael Addition/Cyclization of <i>α</i>,<i>β</i>-Unsaturated Carbonyl Compounds with Naphthols: Synthesis of Naphthopyrans

Abstract

A potassium carbonate promoted tandem oxy-Michael addition/cyclization of α,β-unsaturated carbonyl compounds with naphthol derivatives for the synthesis of 2-substituted naphthopyrans was developed. Using the readily available, inexpensive potassium carbonate as the promoter, a range of different substituted naphthopyrans were prepared.

Keywords

• potassium carbonate
• naphthopyrans
• tandem oxy-Michael addition/cyclization
• synthesis