Folding Types of Dipeptides Containing the Diastereoisomeric Cyclopropanic Analogues of Phenylalanine
摘要:
In order to consider the possible influence of the orientation of a side chain on the peptide backbone, we have studied the molecular structure of four (BuCO)-Bu-t-Pro-c(3)Phe-NHMe model dipeptides, where c(3)Phe denotes each of the four diastereoisomeric 2,3-methanophenylalanines, by using IR and proton NMR experiments. All four derivatives are beta-folded, but the folding type depends on the stereochemistry of the cyclopropane moiety. (C) 1997 Published by Elsevier Science Ltd.