Zr(HSO4)4-catalyzed one-pot three-compon
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Xiao Wang; Guangzhou Lu; Fulin Yan; Weiwei Ma; Liqiang Wu
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Article
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2011
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Journal of Heterocyclic Chemistry
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English
⚖ 83 KB
## Abstract A new, one‐pot, simple thermally efficient and solvent‐free method for the preparation of 7‐alkyl‐6__H__,7__H__‐naphtho[1′,2′:5,6]pyrano[3,2‐__c__]chromen‐6‐ones by condensation of β‐naphthol, aromatic aldehydes, and 4‐hydroxycoumarin using Zr(HSO~4~)~4~ as a safe and efficient catalyst