“Click” Silica‐Supported Sulfonic Acid Catalysts with Variable Acid Strength and Surface Polarity
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منابع مشابه
Phthalimide-N-sulfonic acid and Isatin-N-sulfonic acid as highly efficient catalysts for the synthesis of bis-coumarins
Two highly efficient protocols for the production of bis-coumarins under solvent-free conditions have been introduced. The reaction of 4-hydroxycoumarin (2 eq.) with arylaldehydes (1 eq.) using phthalimide-N-sulfonic acid (PhtSA) or isatin-N-sulfonic acid (IsSA), as solid-acid catalysts, afforded the mentioned compounds with good to excellent yields in short times.Briefly, we have introduced tw...
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ژورنال
عنوان ژورنال: Chemistry – A European Journal
سال: 2019
ISSN: 0947-6539,1521-3765
DOI: 10.1002/chem.201806186