Enantioselective transport by a steroidal guanidinium receptor

Chemistry. 2002 Jul 2;8(13):2931-6. doi: 10.1002/1521-3765(20020703)8:13<2931::AID-CHEM2931>3.0.CO;2-H.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carrier Proteins / chemical synthesis
  • Guanidine / chemistry*
  • Membranes, Artificial*
  • Methylene Chloride
  • Models, Molecular
  • Molecular Mimicry
  • Receptors, Steroid / chemistry*
  • Stereoisomerism

Substances

  • Carrier Proteins
  • Membranes, Artificial
  • Receptors, Steroid
  • Methylene Chloride
  • Guanidine