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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Enantioselective transport by a steroidal guanidinium receptor.

The cationic steroidal receptors 9 and 11 have been synthesized from cholic acid 3. Receptor 9 extracts N-acetyl-alpha-amino acids from aqueous media into chloroform with enantioselectivities (L:D) of 7-10:1. The lipophilic variant 11 has been employed for the enantioselective transport of N-acetylphenylalanine, a) through dichloromethane (DCM) and dichloroethane (DCE) bulk liquid membranes (U-tube apparatus), and b) through 2.5% (v/v) octanol/hexane via hollow fibre membrane contactors. Significant enantioselectivities and multiple turnovers were observed for both types of apparatus.[1]

References

  1. Enantioselective transport by a steroidal guanidinium receptor. Baragaña, B., Blackburn, A.G., Breccia, P., Davis, A.P., de Mendoza, J., Padrón-Carrillo, J.M., Prados, P., Riedner, J., de Vries, J.G. Chemistry (Weinheim an der Bergstrasse, Germany) (2002) [Pubmed]
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