Abstract
A new synthetic pathway has been developed for the preparation of imine-containing pyrrolo[2,1- c][1,4]benzodiazepines (PBDs) and their dimers. Selective reduction of aromatic azides as well as aliphatic amides in a single step leading to an intramolecular reductive cyclization process by employing LiAlH 4 or LiBH 4 provides the cyclized imines.
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