Abstract
AbstractA straightforward, tandem, copper‐catalyzed N‐arylation–condensation has been developed using chiral cyclic 1,2‐diamines and ortho‐haloaryl aldehydes or ketones. The corresponding chiral tricyclic 1,4‐benzodiazepines were synthesized in high yields. Subsequently, the 1,4‐diazepines have been converted to a new class of tetracyclic N‐fused imidazobenzodiazepines (ImBDs) using the van Leusen reaction. A one‐pot sequential strategy has also been demonstrated for the synthesis of ImBDs. The synthetic utility of 1,4‐benzodiazepines and ImBDs is described.magnified image
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