Preparation of benzo- and polybenzocrown ethers by macrocyclization reactions
作者:Robert E. Hanes、Jong Chan Lee、Sheryl N. Ivy、Anna Palka、Richard A. Bartsch
DOI:10.3998/ark.5550190.0011.718
日期:——
the method was used for the preparation of monobenzocrown ethers. Interestingly, for the preparation of monobenzocrown ethers, [2+2] adducts were discovered to be significantly contaminating the products. Dimesylates were chosen as the leaving group due to their ease or preparation and the ability to use the unpurified products with no apparent impact on the macrocyclization.
Polybenzocrown ethers: synthesis by cesium-assisted cyclization and solid-state structures
作者:Robert E. Hanes、Edward C. Ellingsworth、Scott T. Griffin、Robin D. Rogers、Richard A. Bartsch
DOI:10.3998/ark.5550190.0011.717
日期:——
A series of large-ring polybenzocrownethers is prepared by cesium-assistedcyclizations. Reactions of diphenols/bisphenols, dimesylates of oligoethylene glycols and cesium carbonate in MeCN produce the large-ring polybenzocrownethers in high yields. To gain further insight into the structures of these compounds, solid-statestructures of three large-ring crown ethers are obtained by X-ray diffraction
通过铯辅助环化反应制备了一系列大环聚苯并冠醚。二酚/双酚、低聚乙二醇的二甲磺酸盐和碳酸铯在 MeCN 中的反应以高产率产生大环聚苯并冠醚。为了进一步了解这些化合物的结构,通过 X 射线衍射获得了三个大环冠醚的固态结构。