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Novel Synthesis of 1,5-Benzodiazepines Catalyzed by Silica-Supported Dodecatungstophosphoric Acid
Published: 30 November 2006 by MDPI in The 10th International Electronic Conference on Synthetic Organic Chemistry session General Organic Synthesis
Abstract: Silica supported 12-tungstophosphoric acid catalyzes efficiently the reaction of o-phenylenediamines with ketones under solvent-free condition to afford the corresponding 1,5-benzodi-azepines in good yields. The catalyst can be recovered by simple filtration and reused.