ИСТИНА

In this work, amination of 2-chloro-1,10-phenanthroline with diamines under various conditions was studied to obtain 2-amino-1,10-phenanthroline-based ligands. Non-catalytic SNAr amination leads to symmetrical N,N’-diarylation products, while Pd-catalyzed amination allows to obtain unsymmetrical N,N-disubstituted and symmetrical N,N,N’,N’-tetrasubstituted products. The obtained podands were investigated as ligands for potassium and zinc(II) in the industrially important reaction of cyclic carbonates synthesis from CO2 and epoxides under mild conditions (p(CO2) = 1 atm., T = 60–80°C). One of the ligands was found to possess high catalytic activity in the presence of KI (2 mol.%) with a low catalytic loading (0.2 mol%). Mono-substituted cyclic carbonates of various structures have been synthesized with excellent preparative yields ranging from 87–99%.