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- W2064551036 endingPage "8573" @default.
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- W2064551036 abstract "Asymmetric synthesis of (R,R)- and (S,S)-1,8,9,16-tetrahydroxytetraphenylenes was achieved from starting material (2R,3R)-butane-2,3-diol and (2S,3S)-butane-2,3-diol respectively by utilizing a center-to-axis strategy. A series of crown ether compounds 20, 24, and 25 and their corresponding enantiomers derived from chiral tetrahydroxytetraphenylene were synthesized in enantiomerically pure forms. Enantiomeric recognition properties of these hosts toward l- and d-amino acid methyl ester hydrochloride were studied by the UV spectroscopy titration. The tetramer hosts (S,S,S,S,S,S,S,S)-20 and (R,R,R,R,R,R,R,R)-20 exhibited the best enantioselectivities toward l- and d-alanine methyl ester hydrochloride salt with KL/KD = 4.1 and KD/KL = 3.9, respectively. The new chiral macrocyclic hosts would further enrich the host–guest chemistry." @default.
- W2064551036 created "2016-06-24" @default.
- W2064551036 creator A5003257410 @default.
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- W2064551036 date "2013-08-22" @default.
- W2064551036 modified "2023-09-23" @default.
- W2064551036 title "Enantiomeric Recognition of Amino Acid Salts by Macrocyclic Crown Ethers Derived from Enantiomerically Pure 1,8,9,16-Tetrahydroxytetraphenylenes" @default.
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- W2064551036 doi "https://doi.org/10.1021/jo401240k" @default.
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