An Efficient Approach to 2-CF3-Indoles Based on ortho-Nitrobenzaldehydes

Autor: Vasiliy M. Muzalevskiy, Zoia A. Sizova, Vladimir T. Abaev, Valentine G. Nenajdenko
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Molecules, Vol 26, Iss 23, p 7365 (2021)
Druh dokumentu: article
ISSN: 1420-3049
DOI: 10.3390/molecules26237365
Popis: The catalytic olefination reaction of 2-nitrobenzaldehydes with CF3CCl3 afforded stereoselectively trifluoromethylated ortho-nitrostyrenes in up to 88% yield. The reaction of these alkenes with pyrrolidine permits preparation of α-CF3-β-(2-nitroaryl) enamines. Subsequent one pot reduction of nitro-group by Fe-AcOH-H2O system initiated intramolecular cyclization to afford 2-CF3-indoles. Target products can be prepared in up to 85% yields. Broad synthetic scope of the reaction was shown as well as some followed up transformations of 2- CF3-indole.
Databáze: Directory of Open Access Journals
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