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Updated: Mar 23, 2026

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Re(CO)3-Templated Formation of Aza(dibenzo)dipyrromethenes
Laura A Crandall1, Catherine A Bogdanowicz2, Abed Hasheminasab1
1Department of Chemistry, University of Akron , Akron, Ohio 44325-3601, United States.
Abstract:
The Re(CO)3 unit was used to template the formation of aza(dibenzopyrro)methene (ADBM) in the presence of pyridine or N-methylimidazole. The products of these template reactions are six-coordinate complexes, with a facial arrangement of the carbonyls, a bidentate ADBM, and a sixth ligand (pyridine or N-methylimiadozle). Three types of ADBM ligands are produced from these reactions, depending on the degree of hydrolysis; bis(imine)-terminated, bis(oxo)-terminated, and mixed-imine/oxo chelates were formed.
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