作者:Lihua Yuan、Adam R. Sanford、Wen Feng、Aimin Zhang、Jin Zhu、Huaqiang Zeng、Kazuhiro Yamato、Minfeng Li、Joseph S. Ferguson、Bing Gong
DOI:10.1021/jo050798a
日期:2005.12.1
This article describes the synthetic procedures for the preparation of crescent (and helical) aromatic oligoamides developed in recent years in our laboratory. The large-scale preparation of a variety of monomers derived from various tetrasubstituted benzenes is presented. Three different strategies for constructing various oligomers consisting of meta- and meta/para-linked benzene residues are discussed
Highly Efficient, One-Step Macrocyclizations Assisted by the Folding and Preorganization of Precursor Oligomers
作者:Lihua Yuan、Wen Feng、Kazuhiro Yamato、Adam R. Sanford、Dingguo Xu、Hua Guo、Bing Gong
DOI:10.1021/ja0474547
日期:2004.9.1
Highly efficient, one-step macrocyclizations leading to the formation of macrocyclic hexa(aramides) in high yields (69-82%) are described. The one-step macrocyclizations were facilitated by the preorganization or folding of the backbones of uncyclized precursors in the course of macrocyclization. The preorganization of backbones was achieved by the presence of localized three-centered hydrogen bonds