Journal
ORGANIC LETTERS
Volume 20, Issue 8, Pages 2416-2419Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.8b00757
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Funding
- Ministry of Science and Technology (Taiwan) [MOST-106-2628-M-002-002]
- National Taiwan University [NTU-106R880202]
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Simple cyclophanes containing four distant amino N atoms or ether O atoms behave as hosts for the threading of guest diarylguanidinium ions. The recognition system exhibits high synthetic flexibility, allowing unique O-free [2]rotaxanes to be synthesized efficiently (yields of up to 80%) through both threading-followed-by-stoppering and clipping approaches.
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