Potassium Salts of Asymmetrically Substituted Amidinates and a Triazenide

Abstract

Potassiation of amidines and triazenes yields the corresponding potassium amidinates and triazenides. The favored configuration of the amidinate ligands is the (syn-E)-form whereas all known triazenides adopt this isomeric form. Extremely bulky groups at the amidinate ligands enforce the anticonfiguration stabilized by π-interactions between potassium and N-bound aryl groups. A special case has been observed for N′-bound 2-pyridylethyl substituents. In moderately strained [a]

Semistabilized Diazatrienyl Anions from Pyridine Imines and Acetylenes: An Access to (Z)-Stilbene/Imidazopyridine Ensembles, Benzyl Imidazopyridines, and Beyond

“…The known syntheses of 1,2- and 1,3-diazaallyl anions involve deprotonation of monosubstituted hydrazones and amidines . Their application includes alkylation and cycloaddition (1,2-diazaallyl anions) and as metal complexes (1,3-diazaallyl anions). , At the same time, diazaallyl anions possess considerably higher synthetic potential, provided that they would become more accessible and their reactivity would be better studied.…”