作者:Frédéric Garzino、Alain Méou、Pierre Brun
DOI:10.1002/hlca.201000147
日期:2011.1
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 MnIII‐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 Pb2+
我们已经开发了一个分两步的顺序,以制备一系列固定在噻吩/呋喃低聚物上的大环氧杂和硫杂皇冠醚。该序列涉及线性二酯前体在分子内由Mn III促进的环化成2,3-二氢呋喃,其脱氢提供了标题化合物。初步的NMR研究表明,其中之一似乎能特异性地螯合Pb 2+阳离子。