Abstract
Two solid-phase approaches, involving the base-assisted intramolecularalkylation of N-chloroacetyl-Phe derivatives anchored to appropriatesolid supports, were investigated for the preparation of novel β-lactams. When a BAL-type strategy was used, the resin-bound azetidinones were easily formed, as established by MAS-NMR, but final compounds could not be removed from the resin, unless a suitable two linkers system was used. In the second approach, in which the Phe residue is anchored to a Wang-type resin through the carboxylate group, the corresponding 1,4,4-trisubstituted 2-azetidinone was obtained in moderate to good yield and high purity.
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Gerona-Navarro, G., Royo, M., García-López, M.T. et al. Exploring solid-phase approaches for the preparation of new β-lactams from amino acids. Mol Divers 6, 75–84 (2003). https://doi.org/10.1023/B:MODI.0000006837.36303.eb
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DOI: https://doi.org/10.1023/B:MODI.0000006837.36303.eb