Rossi E, Pirovano V, Negrato M, Abbiati G, Dell’Acqua M. Synthesis of constrained analogues of tryptophan.
Beilstein J Org Chem 2015;
11:1997-2006. [PMID:
26664620 PMCID:
PMC4661003 DOI:
10.3762/bjoc.11.216]
[Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/03/2015] [Indexed: 12/19/2022] Open
Abstract
A Lewis acid-catalysed diastereoselective [4 + 2] cycloaddition of vinylindoles and methyl 2-acetamidoacrylate, leading to methyl 3-acetamido-1,2,3,4-tetrahydrocarbazole-3-carboxylate derivatives, is described. Treatment of the obtained cycloadducts under hydrolytic conditions results in the preparation of a small library of compounds bearing the free amino acid function at C-3 and pertaining to the class of constrained tryptophan analogues.
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