Oxalyl retro-peptide gelators. Synthesis, gelation properties and stereochemical effects

• Janja Makarević,
• Milan Jokić,
• Leo Frkanec,
• Vesna Čaplar,
• Nataša Šijaković Vujičić and
• Mladen Žinić

Beilstein J. Org. Chem. 2010, 6, 945–959, doi:10.3762/bjoc.6.106

• chirality as observed for some other gels of the chiral gelators. XRPD, molecular modeling and packing model The X-ray powder diffraction (XRPD) pattern of (S,S)-1b xerogel showed strong peaks corresponding to periodic distance d of 16.1 and 13.4 Å and a weaker peaks corresponding to d’s of 15.1 and 8.6 Å

• )-arrangements of i-Bu groups in the latter. Schematic presentation of the proposed (S,S)-1b and (S,R)-1b basic packing model based on XRPD, 1H NMR, FTIR and molecular modeling results. X-ray powder diffraction (XRPD) diagram of (S,R)-1a water/DMSO xerogel. Oxalyl retro-dipetide gelators; each b to a, (a) LiOH