Catalytic enantioselective addition of hydrogen cyanide to benzaldehyde and p-methoxybenzaldehyde using cyclo-His-(α-Me)Phe as catalyst
摘要:
Two cyclo-dipeptides based on His and the unnatural (alpha Me)Phe have been examined as catalysts in the enantioselective addition of hydrogen cyanide to benzaldehyde and p-methoxy-benzaldehyde. The synthesis, catalytic activity and NMR study towards the mechanism of this reaction are presented. (C) 1997 Elsevier Science Ltd.
Studies on cyclic dipeptides, II. Methylated modifications ofcyclo-[Phe-His]
作者:C. R. Noe、A. Weigand、S. Pirker、P. Liepert
DOI:10.1007/bf00807896
日期:1997.3
Synthesis of seven new cyclic dipeptides and their conformational analysis based on H-1 NMR spectra is reported as well as their application as models to elucidate the mechanism of cyclic dipeptide catalysis in enantioselective mandelonitrile formation. Further evidence is presented to support the view that a highly ordered supramolecular complex of dipeptides acts as catalyst.