期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 68, 期 25, 页码 9835-9838出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo035256c
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The synthesis of three constrained macrocyclic peptide analogues 1 of TMC-95A as potential proteasome inhibitors is described. The key step involves a Ni(0)-mediated macrocyclization of tripeptides 2 bearing halogenated aromatic side chains for the formation of the biaryl junction. In addition, an enantioselective preparation of L-7-bromotryptophan methyl ester 3 using a Corey-O'Donnell alkylation of the glycine benzophenone imine was achieved in good overall yield with very high ee (>85%) on a multigram scale.
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