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Efficient One-Pot Synthesis of Bis(4-hydroxycoumarin)methanes in the Presence of Sulfonic Acid Functionalized Nanoporous Silica (SBA-Pr-SO 3 H)

✍ Scribed by Ziarani, Ghodsi Mohammadi; Badiei, Alireza; Azizi, Masoomeh; Lashgari, Negar

Book ID: 120304189
Publisher: Chinese Electronic Periodical Services
Year: 2013
Tongue: English
Weight: 857 KB
Volume: 60
Category: Article
ISSN: 0009-4536
DOI: 10.1002/jccs.201200530

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## Abstract Silica phenyl sulfonic acid (SPSA) was prepared and effectively used in the one‐pot synthesis of 2‐aryl‐1‐arylmethyl‐1H‐1,3‐benzimidazoles from __o__‐phenylenediamine with aldehydes in water in the presence of tetrabutyl ammonium bromide with good to high yield. Also, SPSA was used as a