Synthesis of Amino-Bridged 6,6'-Disubstituted-2,2'-Bipyridine Ligands for Lanthanide Coordination Chemistry.
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| Title: | Synthesis of Amino-Bridged 6,6'-Disubstituted-2,2'-Bipyridine Ligands for Lanthanide Coordination Chemistry. |
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| Authors: | Mameri, Samir1, Charbonnière, Loïc J.1, Ziessel, Raymond F.1 |
| Source: | Synthesis. Dec2003, Vol. 2003 Issue 17, p2713-2719. 7p. |
| Subjects: | Ligands (Biochemistry), Bipyridine, Rare earth metals, Europium, Luminescence, Chemical reactions |
| Abstract: | Three cognate ligands containing bipyridine carboxylic frameworks were readily prepared under mild conditions from a pivotal 6-bromo-6'-bromomethyl-2,2'-bipyridine building block and a primary amine as starting materials. In one case, the amine was adequately functionalised with a nitro group. Transformation of the resulting bromo derivatives to the corresponding ethyl esters was made possible by the use of a carboethoxylation reaction promoted by palladium(0), while further hydrolysis aflbrded the targeted acids after protonation. Corresponding europium complexes show interesting luminescence properties in water at biological pH values. Key words: bromination; carboalkoxylation; bipyridine-carboxylate; Eu complexes; luminescence. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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