2,3-Dihydro-1H-1,5-benzodiazepines have been synthesized in good to excellent yield from direct condensations of o-phenylenediamines with ketones promoted by sulfamic acid at room temperature under neat condition or in acetonitrile.
Expeditious Entry to 1,5-Benzodiazepines Catalyzed by Sulfamic Acid at Room Temperature in Tap Water Suspension
2,3-Dihydro-1H-1,5-benzodiazepines have been synthesized in tap water suspension as well as in neat condition in good to excellent yield from direct condensations of o-phenylenediamines with ketones promoted by sulfamic acid at room temperature.