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Keywords = isatin-N-sulfonic (IsSA)
Number of Articles: 1
Phthalimide-N-sulfonic acid and Isatin-N-sulfonic acid as highly efficient catalysts for the synthesis of bis-coumarins
Volume 7, Issue 2, pp. 90-159, Serial No. 23 , April 2019, , Pages 139-145
Abstract
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 ... Read More)