Abstract
An efficient one-pot condensation of 4-hydroxylcoumarin, aromatic aldehydes, and 5,5-dimethylcyclohexane-1,3-dione has been achieved with molecular iodine as a catalyst via conventional heating and microwave irradiation techniques, and thus a variety of new tetrahydrobenzo[c]xanthene-1,11-dione derivatives were prepared in good yields.
GRAPHICAL ABSTRACT
ACKNOWLEDGMENT
We are grateful to the Jiangsu Key Laboratory of Chemistry of Low-Dimensional Materials.
Notes
a Microwave power: 100 W, temperature: 120 °C.
b Yields of the isolated products.