Synthesis of β-(trifluoromethyl)furans and spiro-gem-dichlorocyclopropanes from cyclic 1,3-dicarbonyl compounds and α-(trihaloethylidene)nitroethanes
摘要:
While 1,3-dicarbonyl compounds react with (E)-1,1,1-trifluoro-3-nitrobut-2-ene in the presence of sodium acetate to produce the target beta-(trifluoromethyl)furans, their reaction with (E)-1,1,1-trichloro-3-nitrobut-2-ene, under the same conditions, took an entirely different course and gave spiro-gem-dichlorocyclopropanes bearing a 1-nitroethyl moiety, with high diastereoselectivity and in good yields. (C) 2013 Elsevier Ltd. 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.
Uncatalyzed reactions of α-(trihaloethylidene)nitroalkanes with push–pull enamines: a new type of ring–ring tautomerism in cyclobutane derivatives and the dramatic effect of the trihalomethyl group on the reaction pathway
作者:Vladislav Yu. Korotaev、Alexey Yu. Barkov、Pavel A. Slepukhin、Mikhail I. Kodess、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tetlet.2011.08.109
日期:2011.11
A new type of ring–ring isomerism, which consists of the reversible transformation of cyclobutane derivatives into substituted 1,2-oxazine N-oxides was found and studied by NMR spectroscopy and X-ray diffraction analysis. The starting materials were prepared by the stereoselective reaction of α-(trifluoroethylidene)nitroalkanes, which react with ethyl β-morpholino- and β-piperidinocrotonates at the
N-Substituted α-trifluoromethyl β-nitro amines in the synthesis of fluorine-containing 1,2-diamines, amino alcohols, and β-amino acids
作者:V. Yu. Korotaev、A. Yu. Barkov、M. I. Kodess、I. B. Kutyashev、P. A. Slepukhin、A. Ya. Zapevalov
DOI:10.1007/s11172-009-0257-2
日期:2009.9
Reactions of 2-diazo-1,1,1-trifluoro-3-nitropropane or 1-trifluoromethyl-2-nitroethenes with amines and amino alcohols afforded N-mono- and N,N-disubstituted α-trifluoromethyl β-nitro amines, which were used to obtain a number of trifluoromethyl-containing 1,2-diamines, amino alcohols, and β-amino acids.
Synthesis of 1-hetaryl-5,6-dihydropyrrolo[2,1-a]isoquinolines from 1-hetarylmethyl-3,4-dihydroisoquinolines and 1,1,1-trifluoro-3-nitrobut-2-ene
作者:V. Yu. Korotaev、V. Ya. Sosnovskikh、A. Yu. Barkov、P. A. Slepukhin、Yu. V. Shklyaev
DOI:10.1007/s11172-015-0950-2
日期:2015.4
1-Hetarylmethyl-3,4-dihydroisoquinolines and their crown-containing derivatives reacted with 1,1,1-trifluoro-3-nitrobut-2-ene upon reflux in isobutanol or in toluene at room temperature to form 1-hetaryl-5,6-dihydropyrrolo[2,1-a]isoquinolines, including those with the benzocrown ether fragments.