A New Synthesis of Fused Oxa- and Thiacrown Ethers-Thiophene/Furan Oligomers.
- Resource Type
- Article
- Authors
- Garzino, Frédéric; Méou, Alain; Brun, Pierre
- Source
- Helvetica Chimica Acta. Jan2011, Vol. 94 Issue 1, p18-27. 10p. 1 Chart, 1 Graph.
- Subject
- Language
- ISSN
- 0018-019X
We have developed a two-step sequence for preparing a series of macrocyclic oxa- and thiacrown ethers affixed to a thiophene/furan oligomer. The sequence involves the intramolecular Mn-promoted cyclization of linear diester precursors into 2,3-dihydrofurans, whose dehydrogenation furnishes the title compounds. A preliminary NMR study has shown that one of them seems to specifically chelate Pb cations. [ABSTRACT FROM AUTHOR]