Variable Ion Selectivity in [n.3.3](1,3,5)Crownophanes: The “Breathing” Process
作者： Jianwei Xu , Yee-Hing Lai , Weiling Wang
DOI: 10.1021/OL034424K
关键词: Intramolecular cyclization 、 Cavity size 、 Chemistry 、 Ion selectivity 、 Stereochemistry 、 Crystallography 、 Moiety 、 Breathing 、 Physical and Theoretical Chemistry 、 Organic chemistry 、 Biochemistry
摘要: A series of dithia[n.3.3](1.3.5)crownophanes were synthesized by cesium carbonate-assisted intramolecular cyclization reactions in 10−31% yields. Their complexation behavior exhibits an unusual ion-selectivity preference due to the presence a “breathing” process dithia[3.3]metacyclophane moiety, which indirectly controls ion selectivity through adjustment cavity size crown unit. This breathing mechanism is also supported observation made X-ray crystallographic analysis.
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