Recognition of chiral anions using calix[4]arene-based ureido receptor in the 1,3-alternate conformation

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• 作者：Filip Botha ; Jan Budka ; V谩clav Eigner ; Old艡ich Hude膷ek ; Luk谩拧 Vrzal ; Ivana C铆sa艡ov谩 ; Pavel Lhot谩k
• 关键词：Calixarene ; Alkylation ; NMR titration ; Chiral receptor ; Anion recognition
• 刊名：Tetrahedron
• 出版年：14 January, 2014
• 年：2014
• 卷：70
• 期：2
• 页码：477-483
• 全文大小：767 K

文摘

A new type of calixarene-based receptor designed for the recognition of chiral anions was prepared by the introduction of (S)-2-methylbutan-1-ol moieties into the lower rim of calixarene. The immobilization of calixarene skeleton in the 1,3-alternate conformation enabled the construction of a cavity consisting of preorganised ureido functions and chiral substituents in close proximity. This cavity is capable of chiral discrimination of selected anions as demonstrated on d- and l-phenylalaninates.