Abstract
2,3-Dihydro-1 H-1,5-benzodiazepines have been synthesized in solvent-free conditions in excellent yield from o-phenylenediamines and ketones in the presence of a catalytic amount of Sc(OTf) 3. This method is a very easy, rapid, and high yielding reaction for the synthesis of 1,5-benzodiazepine derivatives.
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