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Abstract
A new, convenient, and selective route to the dimethylpyrano[2,3‐c]xanthen‐7‐one, analog of acronycine, via aromatization and dehydrogenation reactions from the corresponding saturated hexahydro intermediate is described.
Acknowledgment
Our thanks to Professor N. Pouli (University of Athens, Greece) for the gift of a reference sample of 6‐methoxy‐3,3‐dimethyl‐3H,7H‐pyrano[2,3‐c]xanthen‐7‐one 6b.