Bulky alkylaminophenol chelates with high potential for functionalization

Publication date: Available online 24 August 2018Source: Comptes Rendus ChimieAuthor(s): Monika Olesiejuk, Karolina Bakalorz, Tomasz Krawczyk, Nikodem KuźnikAbstractAminophenols are an important class of N,O-ligands, particularly for the coordination of first-row transition metals. While their structural and electronic character and the additional possibility of bioactivation are well appreciated in coordination chemistry, particularly of responsive systems, the synthesis of the more branched and structurally demanding models is still a challenge. Therefore, the synthesis of bulky bis(hydroxybenzyl)-N’-(aminopyridyl)propanamines is described here. It consists of the Mannich reaction of 2,4-disubstituted phenols with 3-aminopropan-1-ol and paraformaldehyde to N,N-bis(2-hydroxybenzyl)-3-aminopropan-1-ol. Substitution of the hydroxyl group with chlorine followed by amination with 2-(aminomethyl)pyridine results in bulky pentadentate N,O-ligands with a free site on the nitrogen atom for further functionalization. The method features good yields and high selectivity, and the products are well identified by spectroscopic methods.Graphical abstract

Source: Comptes Rendus Chimie - August 25, 2018 Category: Chemistry Source Type: research