El-Marrouki D, Touchet S, Abdelli A, M’Rabet H, Lotfi Efrit M, Gros PC. Tuneable access to indole, indolone, and cinnoline derivatives from a common 1,4-diketone Michael acceptor.
Beilstein J Org Chem 2020;
16:1722-1731. [PMID:
32733616 PMCID:
PMC7372239 DOI:
10.3762/bjoc.16.144]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/06/2020] [Indexed: 12/24/2022] Open
Abstract
A convergent strategy is reported for the construction of nitrogen-containing heterocycles from common substrates: 1,4-diketones and primary amines. Indeed, by just varying the substrates, the substituents, or the heating mode, it is possible to selectively synthesize indole, indolone (1,5,6,7-tetrahydroindol-4-one), or cinnoline (5,6,7,8-tetrahydrocinnoline) derivatives in moderate to excellent yields.
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