Benzenediazonium Tetrafluoroborate‐Catalyzed Formal [3 + 3] Cyclization of 4‐Hydroxycoumarins With Propargylicalcohols
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DOI: 10.1002/jhet.4912
Abstract: A formal [3 + 3] cycloaddition of 4‐hydroxycoumarins with propargylicalcohols was established under mild conditions. This strategy utilizes diazonium tetrafluoroborate as the Lewis acid catalyst and provides a practical approach for delivering pyranocoumarin derivatives in moderate to… read more here.
Keywords: hydroxycoumarins propargylicalcohols; catalyzed formal; formal cyclization; benzenediazonium tetrafluoroborate ... See more keywords