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A series of 2,6-diaminopyridines was synthesized for the first time, containing phosphoryl sterically hindered phenolic fragments in the aromatic core. The antioxidant activity of these compounds was investigated, 2,6-diaminopyridine derivatives were shown to exhibit higher activity in comparison with their structural analogues. For dialkyl/diphenyl [(3,5-di-tert-butyl-4-hydroxyphenyl) (2,6-diaminopyridin-3-yl)...
In solution, 1,5‐diaza‐3,7‐diphosphacyclooctanes (PR2NR′2) are in equilibrium between the crown (CW; major) and chair–boat (CB; minor) forms. Aromatic substituent at the nitrogen atom shifts the equilibrium in favor of the CW form. [Pt(PR2NR′2)]Cl2 complexes exist in solution in the CB (CB*) conformation irrespective of the substituent at the heteroatoms. Aromatic substituents on N notably decrease...
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