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Silica Gel‐Supported Polyphosphoric Acid (PPA/SiO 2 ): An Efficient and Reusable Heterogeneous Catalyst for Facile Synthesis of 14‐Aryl‐14 H ‐dibenzo[ a , j ]xanthenes under Solvent‐free Conditions
Author(s) -
Khojastehnezhad Amir,
Davoodnia Abolghasem,
Bakavoli Mehdi,
TavakoliHoseini Niloofar,
ZeinaliDastmalbaf Mohsen
Publication year - 2011
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201190081
Subject(s) - chemistry , aryl , catalysis , condensation , organic chemistry , solvent , solid acid , silica gel , condensation reaction , simple (philosophy) , combinatorial chemistry , alkyl , physics , thermodynamics , philosophy , epistemology
A simple, efficient and green method for the synthesis of 14‐aryl‐14 H ‐dibenzo[ a , j ]xanthenes by a one‐pot condensation reaction of β ‐naphthol and aryl aldehydes using silica gel‐supported polyphosphoric acid (PPA/SiO 2 ), an effective and reusable catalyst, under solvent‐free conditions is described. The present methodology offers several advantages, such as a simple procedure with an easy work‐up, short reaction times, high yields, and the absence of any volatile and hazardous organic solvents.