Journal
TETRAHEDRON
Volume 57, Issue 23, Pages 4967-4975Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(01)00408-2
Keywords
acridines; crown ethers; fluorescence; ionophores
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Novel fluorescent 18-crown-6 type ligands containing acridono and thioacridono units were synthesised. The acridono ligand was prepared by the oxidation of its acridino analogue, and also by the cyclisation of 4,5-dihydroxyacridine-9(10H)-one and tetraethylene glycol di-p-tosylate in the presence of K2CO3. The acridono macrocycle was converted to the thioacridono ligand using Lawessons's Reagent. The synthesis of several precursors leading to the preparation of an acridono-18-crown-6 fluorophore was also performed. These precursors can also be very useful building blocks for acridine, acridone and thioacridone derivatives of chemotherapeutical importance. (C) 2001 Elsevier Science Ltd. All rights reserved.
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