New functionalized, differently fluorinated building-blocks via Michael addition to γ-fluoro-α-nitroalkenes
摘要:
The Michael addition of ketone-derived enamines, metalated methylene active compounds and N-methyl pyrroles to gamma-fluoro-alpha-nitroalkenes provided in moderate to good isolated yields the corresponding beta-fluoroalkyl nitro compounds, which represent new interesting, highly functionalized building blocks in organofluorine chemistry. (c) 2006 Elsevier B.V. All rights reserved.
A novel synthesis of γ-nitro ketones via detrifluoroacetylative Michael addition of 1-trifluoromethyl-1,3-diketones to conjugated nitroalkenes
作者:Alexey Yu. Barkov、Vladislav Yu. Korotaev、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tetlet.2013.10.008
日期:2013.12
A novel synthesis of γ-nitro ketones via detrifluoroacetylative Michaeladdition of 1-trifluoromethyl-1,3-diketones to conjugated nitroalkenes in the presence of sodium acetate in ethanol at room temperature is developed. A series of trifluoromethylated 1,3-diones and nitroalkenes are surveyed to determine the scope of this high-yielding reaction.
Reactions of 3,3,3-trichloro(trifluoro)-1-nitropropenes with 2-morpholinoalk-1-enes
作者:V. Yu. Korotaev、A. Yu. Barkov、P. A. Slepukhin、V. Ya. Sosnovskikh
DOI:10.1007/s11172-011-0020-3
日期:2011.1
The reaction of 3,3,3-trichloro(trifluoro)-1-nitropropenes with 2-morpholinoalk-1-enes affords the nitroalkylated Z-enamines whose subsequent hydrolysis results in 2-trihalomethyl-1-nitroalkan-4-ones.
Enantioselective synthesis of β-trifluoromethylated pyrrolines has been developed by the organocatalyzed-conjugated addition of nitromethane to β-trifluoromethylated enones, followed by a nitro-reduction/cyclization/dehydration sequence in a one-pot procedure with 97â98% ees.