The reaction of lanthanide(III) salts with 2,6-diformylphenol derivatives in alcoholic media and in the presence of primary amines could lead to formation of different intermediates due to a formyl group - solvent interaction. In particular Schiff bases prepared in alcoholic media should result in mixtures of variously acetalated moieties, derived from acetalation of one of the formyl groups. When dehydroacetic acid reacts with amines, the phenolic moiety turns into pyrone carbonyl owing to an internal rearrangement, the whole molecule behaving preferentially as a neutral donor. Lanthanide salt complexes with condensation precursors containing either formylphenols of ketophenols is reported, along with lanthanide(III) nitrate adducts with 2,6-dimethyl-4H-pyran-4-one.
LANTHANIDE(III) COMPLEXES WITH CONDENSATION PRECURSORS
FREGONA, DOLORES;FARAGLIA, GIUSEPPINA;
1992
Abstract
The reaction of lanthanide(III) salts with 2,6-diformylphenol derivatives in alcoholic media and in the presence of primary amines could lead to formation of different intermediates due to a formyl group - solvent interaction. In particular Schiff bases prepared in alcoholic media should result in mixtures of variously acetalated moieties, derived from acetalation of one of the formyl groups. When dehydroacetic acid reacts with amines, the phenolic moiety turns into pyrone carbonyl owing to an internal rearrangement, the whole molecule behaving preferentially as a neutral donor. Lanthanide salt complexes with condensation precursors containing either formylphenols of ketophenols is reported, along with lanthanide(III) nitrate adducts with 2,6-dimethyl-4H-pyran-4-one.Pubblicazioni consigliate
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