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Synthesis and Characterization of Benzo-15-Crown-5 Ethers with Appended N2O Schiff Bases

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Author(s): Carla Sousa | Cristina Freire | Baltazar de Castro

Journal: Molecules
ISSN 1420-3049

Volume: 8;
Issue: 12;
Start page: 894;
Date: 2003;
Original page

Keywords: Schiff base ligands | crown ethers | hetero-binucleating ligands | hydrazine | salicylaldehyde

ABSTRACT
New derivatives of benzo-15-crown-5 with flexible appended N2O unsymmetrical Schiff bases were prepared by a two step procedure which involves: (i) preparation of N2O Schiff bases by condensation of hydrazine with salicylaldehyde, 3-methoxysalicylaldehyde or 2-hydroxy-1-naphtaldehyde and (ii) reaction of the resulting NH2 functionalized compounds with 4’-formyl-benzo-15-crown-5.
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