Dibenzotetraaza Crown Ethers: A New Family of Crown Ethers Based on <i>o</i>-Phenylenediamine
作者:Sven H. Hausner、Cynthia A. F. Striley、Jeanette A. Krause-Bauer、Hans Zimmer
DOI:10.1021/jo050281z
日期:2005.7.1
benzimidizoles were used to produce DBTA crownethers with modified substituents and ether bridges, as well as benzimidazolidine crownethers. The synthetic approach presented here proved to be a convenient route to a new family of crownethers with overall yields of up to 48% based on the benzimidazole. Yields for the ring-closing step were generally high, ranging from 51% to 94%, without the need for high-dilution