Single-Step Formation of Structurally Defined Bicyclic Peptides via SNAr Cyclization
Organic Letters2001Vol. 3(7), pp. 971–974
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Abstract
[structure: see text]. A solid-phase methodology for macrocyclization via an S(N)Ar reaction has been developed for the unambiguous formation of bicyclic peptidic compounds in a single cyclization step. The cyclization strategy involves the reaction of a 3,5-dihydroxybenzoyl group with two nitrofluorobenzoyl moieties. The symmetry of the dihydroxy aromatic ring results in a single product, and the remaining nitro groups are subsequently reduced to anilines and acylated.
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