Journal
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
Volume -, Issue 11, Pages 1329-1341Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b009215k
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Receptors 5-11, bearing guanidinium, carbamate and (in some cases) other functional groups, were synthesized from cholic acid 1. These cations were shown to extract chiral carboxylate anions from aqueous buffer into chloroform with significant enantioselectivities. The most successful receptors bore two carbamate substituents and achieved, in the best cases, ratios (L:D) of 7-10:1 for a series of five N- acetyl alpha -amino acids.
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