- Steroidal ureas as enantioselective receptors for an N-acetyl alpha-amino carboxylate.
Steroidal ureas as enantioselective receptors for an N-acetyl alpha-amino carboxylate.
Organic letters (2002-12-20)
Laura Siracusa, Fionn M Hurley, Stefan Dresen, Laurence J Lawless, M Nieves Pérez-Payán, Anthony P Davis
PMID12489949
ABSTRACT
[reaction: see text] Cholic acid has been elaborated into three regioisomeric bis-carbamoylureas, which have been investigated as enantioselective receptors for N-acetyl phenylalanine. L/D selectivities, peaking at 5:1, have been determined by a sensitive and rapid MS-based extraction method that should be generalizable to related systems.
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