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Description
| - Bazicky katalyzovaná cyklizace methyl-(2-kyan-4,6-dinitrofenylsulfanyl)acetátu poskytuje methyl-3-amino-5,7-dinitrobenzo[b]thiofen-2-karboxylát. To znamená, že vytvořený karbaniont přednostně atakuje kyan skupinu a nikoliv nitro skupinu. Kinetika této cyklizace byla studována v methanolických terciárních aminových pufrech a byl navržen mechanismus. Reakce je předmětem obecné bázické katalýzy. Zjištěná hodnota Bronstedova koeficientu beta = 0.9 +/- 0.1 indikuje pozdní tranzitní stav rychlost určujícího proton-transferu. (cs)
- Base-catalysed ring closure of methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate produces methyl-3-amino-5,7-dinitrobenzo[b]thiophene-2-carboxylate. This means that the carbanion initially formed attacks cyano group and not nitro group. The kinetics of this cyclisation reaction has been studied in methanolic buffers of tert-amine/tert-ammonium chloride, and the reaction mechanism was suggested. The reaction is subject to general base catalysis. The found value of the Brřnsted coefficient is beta = 0.9 +/- 0.1, which indicates a late transition state of the rate-limiting proton transfer.
- Base-catalysed ring closure of methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate produces methyl-3-amino-5,7-dinitrobenzo[b]thiophene-2-carboxylate. This means that the carbanion initially formed attacks cyano group and not nitro group. The kinetics of this cyclisation reaction has been studied in methanolic buffers of tert-amine/tert-ammonium chloride, and the reaction mechanism was suggested. The reaction is subject to general base catalysis. The found value of the Brřnsted coefficient is beta = 0.9 +/- 0.1, which indicates a late transition state of the rate-limiting proton transfer. (en)
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Title
| - Kinetics and Mechanism of the Cyclisation of Methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate Producing Methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-carboxylate
- Kinetics and Mechanism of the Cyclisation of Methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate Producing Methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-carboxylate (en)
- Kinetika a mechanismus cyklizace methyl-(2-kyan-4,6-dinitrofenylsulfanyl)acetatu poskytující methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-karboxylát (cs)
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skos:prefLabel
| - Kinetics and Mechanism of the Cyclisation of Methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate Producing Methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-carboxylate
- Kinetics and Mechanism of the Cyclisation of Methyl-(2-cyano-4,6-dinitrophenylsulfanyl) acetate Producing Methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-carboxylate (en)
- Kinetika a mechanismus cyklizace methyl-(2-kyan-4,6-dinitrofenylsulfanyl)acetatu poskytující methyl-3-amino-5,7-dinitro-benzo[b]thiophene-2-karboxylát (cs)
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skos:notation
| - RIV/00216275:25310/04:00001955!RIV/2005/GA0/253105/N
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http://linked.open.../vavai/riv/strany
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| - RIV/00216275:25310/04:00001955
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http://linked.open.../riv/klicovaSlova
| - Kinetics;mechanism methyl-(2-cyano-4;6-dinitrophenylsulfanyl) acetate;methyl-3-amino-5;7-dinitro-benzo[b]thiophene-2-carboxylate; (en)
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http://linked.open...iv/tvurceVysledku
| - Hanusek, Jiří
- Macháček, Vladimír
- Pešková, Markéta
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