Owens TD, Semple JE. Atom-economical synthesis of the N(10)-C(17) fragment of cyclotheonamides via a novel Passerini reaction-deprotection-acyl migration strategy.
Org Lett 2001;
3:3301-4. [PMID:
11594819 DOI:
10.1021/ol0165239]
[Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text]. A novel variant of the atom-economical Passerini reaction between suitably protected argininal, dipeptide isonitrile, and proline components afforded adduct 13. Orthogonal N-deprotection of 13 led, via a smooth O- to N-acyl migration, to 14, which constitutes the N(10)-C(17) fragment of the cyclotheonamide family of serine protease inhibitors. Each reaction in this three-step protocol proceeds in good yield and under very mild conditions.
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