期刊
TETRAHEDRON LETTERS
卷 49, 期 48, 页码 6917-6920出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.09.110
关键词
Crown ether; Secondary ammonium salt; Host-guest system; Pseudrotaxane; Rotaxane
资金
- National Natural Science Foundation of China [20604020, 20774086]
Pyrido-21-crown-7 (P21C7) has been synthesized and shown to form [2]pseudorotaxanes spontaneously with secondary dialkylammonium ions. These complexes are stronger than their benzo-21-crown-7 counterparts and much stronger than their dibenzo-24-crown-8 counterparts. Based on this new P21C7/secondary dialkylammonium salt recognition motif, a [2]rotaxane terminated by phenyl groups as stoppers has been successfully constructed using the threading-followed-by-stoppering technique. (c) 2008 Elsevier Ltd. All rights reserved.
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