Abstract
The synthesis of 6,7-diacylcoumarins is reported via the oxidation of 6-acetyl-7-hydroxycoumarin N-acylhydrazones with lead tetraacetate. The procedure involves transformation of hydroxy into an acyl group and formation of a new C–C bond.
ACKNOWLEDGMENT
The authors are grateful to the Royal Society of Chemistry for financial support of this work.
Notes
a Mps are uncorrected.
b Compounds 4a–4f were recrystallized from ethanol.