Search Results - "Viehe, H. G."

Captodative substituent effects in radical chemistry by Viehe, H. G., Merenyi, Robert, Janousek, Z.

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Methylation of indole during catalytic tests for hydrodenitrogenation (HDN) reactions by Callant, Marc, Holder, Keith A., Viehe, Heinz G., Grange, Paul, Delmon, Bernard

“…Hydrodenitrogenation (HDN) is a catalytic process aimed at reducing the nitrogen content of petroleum crudes. We studied the reactivity of organic nitrogen…”
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Aza analogy to singlet oxygen. The simultaneous stereospecific functionalization of the four cyclopentadiene sp2 carbon atoms by reaction with nitrosochloroethylenes by Viehe, H. G, Merenyi, R, Francotte, E, Van Meerssche, M, Germain, G, Declercq, J. P, Bodart-Gilmont, J

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An expeditious synthesis of 2-dialkylamino-4-chloropyrimidines from silylated primary enamines and phosgeniminium salts by GUILLOT, N, JANOUSEK, Z, VIEHE, H. G

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Diastereoselective 1,3-dipolar cycloadditions of new azomethine ylides derived from trifluorothioacetamides or cyanothioformamides by Laduron, Frédéric, Viehe, Heinz G

“…Deprotonation of trifluoromethyl or cyano thioamidium salts generates new azomethine ylides which undergo cycloaddition to dipolarophiles with high…”
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The captodative effect by Viehe, Heinz G, Janousek, Zdenek, Merenyi, Robert, Stella, Lucien

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Trifluoromethylated pyrimidines starting from β-trifluoroacetyl-lactams, -lactone and -cyclanone by BOUILLON, J.-P, BOUILLON, V, WYNANTS, C, JANOUSEK, Z, VIEHE, H. G

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The intermediate of “α-cyclisation of tertiary amines” as a vinyl-1,3-dipole by De Boeck, Benoît, Viehe, Heinz G

“…Captodative α-cyano-enamines react at room temperature with DMAD via [2+2] cycloaddition and cycloreversion to dienamines 1. These can be isolated or cyclise…”
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Trifluoroethyl sulfenylation or sulfinylation with 2,2,2-trifluoroethyl t-butyl sulfoxide by Redon, Martine, Janousek, Zdenek, Viehe, Heinz G.

“…Treatment of 2,2,2-trifluoroethyl t-butyl sulfoxide 8 under acylating conditions, in the presence of various alkenes or 1-hexyne gives β-trifluoroacetoxy…”
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Diastereoselective cycloadditions of new trifluoromethyl azomethine ylides derived from trifluorothioacetamides by Laduron, Frédéric, Ates, Célal, Viehe, Heinz G.

“…Two methods of generation of new trifluoromethyl azomethine ylides are described: by heating N,N-dimethyl-bis(methylthio)-orthotrifluoroacetamide 2 or by…”
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2-Phenylthio-3,3,3-trifluoropropene, its sulfoxide and sulfone: Synthesis and reactivity in 1,3-dipolar cycloadditions by Plancquaert, Marie-Aimée, Redon, Martine, Janousek, Zdenek, Viehe, Heinz G

“…Derivatives of 3,3,3-trifluoropropene 1: α-sulfide 2, sulfoxide 3, sulfone 4 and bromide 6 are useful trifluoromethylated synthons. On reaction with diazo…”
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2-phenylthio-3,3,3-trifluoropropene, its sulfoxide or sulfone in Diels-Alder cycloadditions by Redon, Martine, Janousek, Zdenek, Viehe, Heinz G.

“…The Diels-Alder reaction of 2-phenylthio-3,3,3-trifluoropropene 1 and its derivatives sulfoxide 2 and sulfone 3, respectively was carried out with…”
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5-Aminopyrazoles from enolisable ketones and 1-cyano-1-alkylhydrazines by Ryckmans, Thomas, Viehe, Heinz-Gunter, Feneau-Dupont, Janine, Tinant, Bernard, Declerco, Jean-Paul

“…The reaction of enolisable ketones with 1-alkyl-1-cyanohydrazines leads to the corresponding cyanohydrazones. These compounds cyclise under thermal or mildly…”
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Heterocyclisation of 3-Trifluoroacetyllactams by Hydrazines by G. Viehe, Heinz, Bouliion, Jean-Philippe, Frisque-Hesbain, Anne-Marie, Janousek, Zdenek

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Synthesis and cycloaddition reactions of acetylenic iminium compounds by Baum, Jonathan S, Viehe, Heinz G

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Model of the trapping of oxygen radicals: trapping of t-butoxy radicals by cd olefins by Gorissen-Hervens, F, Mignani, S, Janousek, Z, Merényi, R, Viehe, H G

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Selective catalysis of the transformation of formamides to nitriles with extension of the hydrocarbon chain by Rodriguez, Michel V. E, Delmon, Bernard, Viehe, Heinz G

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