α-Trifluoromethyl-β-aryl enamines in the synthesis of trifluoromethylated heterocycles by the Fischer and the Pictet–Spengler reactions
作者:Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe
DOI:10.1016/j.tet.2009.06.120
日期:2009.9
α-Trifluoromethyl-β-aryl enamines were successfully used as synthetic equivalents of benzyltrifluoromethyl ketones in both the Fischer indole synthesis and the Pictet–Spengler reaction. Accordingly, 2-trifluoromethyl indoles and a variety of trifluoromethylated 4,5,6,7-terahydro-1H-pyridines including carbolines were synthesized in moderate to good yields.
An Efficient Approach to 2-CF3-Indoles Based on ortho-Nitrobenzaldehydes
作者:Vasiliy M. Muzalevskiy、Zoia A. Sizova、Vladimir T. Abaev、Valentine G. Nenajdenko
DOI:10.3390/molecules26237365
日期:——
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
Synthesis of α-trifluoromethyl-phenethylamines from α-trifluoromethyl β-aryl enamines and β-chloro-β-(trifluoromethyl)styrenes
作者:Vasiliy M. Muzalevskiy、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe、Valentine G. Nenajdenko
DOI:10.1016/j.jfluchem.2011.06.030
日期:2011.12
A novel synthetic approach towards α-trifluoromethyl-phenethylamines was elaborated by reduction of the electron deficient β-aryl-α-trifluoromethyl enamines and imines with sodiumcyanoborohydride in the presence of trifluoroaceticacid. The starting imines were prepared by the reaction of primary amines with β-aryl-α-trifluoromethyl enamines or β-chloro-β-(trifluoromethyl)styrenes.
New approaches to the synthesis of 2-(trifluoromethyl)indole and 2-amino-3-(trifluoromethyl)quinoline
作者:V. M. Muzalevskiy、A. V. Shastin、E. S. Balenkova、G. Haufe、V. G. Nenajdenko
DOI:10.1007/s11172-008-0306-2
日期:2008.10
New synthetic approaches to the preparation of 2-(trifluoromethyl)indole and 2-amino-3-(trifluoromethyl)quinoline have been developed. In both cases, conditions of the Leimgruber-Batcho synthesis of indoles were used in the key step.
Synthesis and Reactions of 3-Halogenated 2-CF3-Indoles
作者:Vasiliy M. Muzalevskiy、Zoia A. Sizova、Valentine G. Nenajdenko
DOI:10.3390/molecules27248822
日期:——
and tosyl-groups can be installed at the nitrogen atom of prepared indoles in high yields by base catalyzed reaction with the corresponding alkylating (sulfonylating) reagents. A high synthetic utility of the prepared haloindoles in the reaction with various nucleophilies was shown. The reaction with 4-methylthiophenol and copper cyanide afforded the corresponding sulfides and nitriles in high yield