Functionalized Hydrocarbon Belts: Synthesis,Structure and Properties |
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Authors: | Yi Peng Prof Dr Shuo Tong Dr Yang Zhang Prof Dr Mei-Xiang Wang |
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Institution: | MOE Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084 China |
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Abstract: | Hydrocarbon belts have drawn great attention because of their unique structures and tantalizing properties. Although a few belts and heteroatom-doped analogs have been synthesized, belt molecules containing non-hexagonal rings remain rare. Herein we report the construction and application of unprecedented zigzag-type hydrocarbon belts which contain functionalized eight-membered rings. The synthesis features fourfold intramolecular acylation reactions of resorcin4]arene-derived intermediates, which affords C4-symmetric tetrabenzobelt4]arene4]cyclooctatrienones. Stereoselective ketone reduction with LiAlH4 and nucleophilic addition with alkynyllithiums provide the corresponding tetrahydroxylated belts. The tetraol and its methyl ether are powerful and selective hosts to form 2 : 1 and 1 : 1 complexes with cesium ion, respectively, with binding constants up to (1.71±0.33)×1011 M−2 and (1.50±0.16)×106 M−1. In addition, enantiopure C4-symmetric belts can emit CPL with |glum| being around 0.01. |
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Keywords: | Cesium Circularly Polarized Luminescence Hydrocarbon Belt Resorcin[4]Arene Zigzag |
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