(Z)-N'-(1H-Benzo[d]imidazol-2-Yl)-Arylimidamide Adducts of 2-Aminobenzimidazole and Aromatic Nitriles: Structural and Spectroscopic Proof of Regiochemical and Stereochemical Outcomes
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Here we discuss the regiochemistry of nucleophilic addition of 2-aminobenzimidazole to nitriles, leading to imidamide (amidine) adducts. Additionally, we use extensive NMR analysis and ultimately X-ray crystallography to demonstrate both the regiochemistry and stereochemistry of the addition products, arising from derivatisation of the exocylic 2-amino group.