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Zr(HSO 4 ) 4 ‐catalyzed one‐pot three‐component synthesis of 7‐alkyl‐6 H ,7 H ‐naphtho[1′,2′:5,6]pyrano[3,2‐ c ]chromen‐6‐ones
Author(s) -
Wang Xiao,
Lu Guangzhou,
Yan Fulin,
Ma Weiwei,
Wu Liqiang
Publication year - 2011
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.755
Subject(s) - chemistry , catalysis , alkyl , condensation , solvent , organic chemistry , component (thermodynamics) , reaction conditions , condensation reaction , simple (philosophy) , physics , thermodynamics , philosophy , epistemology
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 is described. This method has the advantages of high yields, a cleaner reaction, simple methodology, short reaction times, easy workup, and greener conditions. J. Heterocyclic Chem., (2011).