Výsledky vyhledávání - "Karolina Stachowska"

Phenazines and TheirN-Oxides as Products of Cyclization ofN-Aryl-2-nitrosoanilines - Disproof of the Reported Homolytic Cross-Coupling Process Leading to Benzo[c]cinnoline Oxides

Autor: Karolina Stachowska, Andrzej Kwast, Zbigniew Wrobel

Publikováno v: European Journal of Organic Chemistry. 2014:7721-7725

The base-promoted homolytic cross-coupling reaction of nitroarenes and anilines involving single electron transfer and leading to benzo[c]cinnoline oxides reported by Sythana et al. (S. K. Sythana, S. Unni, Y. M. Kshirsagar, P. R. Bhagat, Eur. J. Org

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a5daea5fa0d6f84e242e8e10b8e9f6f
https://doi.org/10.1002/ejoc.201402624

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Efficient Synthesis of 1-Arylquinoxalin-2(1H)-onesviaCyclocondensation ofN-Aryl-Substituted 2-Nitrosoanilines with Functionalized Alkyl Acetates

Autor: Zbigniew Wrobel, Izabela Turska, Andrzej Kwast, Karolina Stachowska, Robert Pawlowski, Agata Gościk, Magdalena Krolikiewicz

Publikováno v: Helvetica Chimica Acta. 96:956-968

N-Aryl-substituted 2-nitrosoanilines (=2-nitrosobenzenamines) 1, readily available by nucleophilic substitution of the ortho-H-atom in nitroarenes with arenamines, react with 2-substituted acetic acid esters in the presence of a weak base giving 1-ar

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https://doi.org/10.1002/hlca.201200304

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Regioselective Aromatic Nucleophilic Substitution in N-Aryl-2-nitrosoanilines with Oxygen and Nitrogen Nucleophiles

Autor: Andrzej Kwast, Zbigniew Wróbel, Karolina Stachowska

Publikováno v: Synthesis. 45:127-133

Aromatic nucleophilic substitution of halogens in N-aryl-2-nitrosoanilines with ammonia, alkylamines and alkoxide ions proceeds efficiently and highly regioselectively in the position para to the nitroso group. When two halogen atoms ortho and para a

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https://doi.org/10.1055/s-0032-1316823

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N-Aryl-2-nitrosoanilines as intermediates in the synthesis of substituted phenazines from nitroarenes

Autor: Adam Trawczyński, Karolina Stachowska, Zbigniew Wróbel, Andrzej Kwast

Publikováno v: Tetrahedron Letters. 52:6484-6488

N-Aryl-2-nitrosoanilines, available from the reaction of nitroarenes with anilide anions, undergo cyclization to furnish substituted phenazines. The reaction is promoted by potassium carbonate in methanol, N,O-bis(trimethylsilyl)acetamide (BSA) in ap

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https://doi.org/10.1016/j.tetlet.2011.09.113

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N-Aryl-2-nitrosoanilines as Intermediates in the Two-Step Synthesis of Substituted 1,2-Diarylbenzimidazoles from Simple Nitroarenes

Autor: Zbigniew Wrobel, Andrzej Kwast, Karolina Stachowska, Krzysztof Grudzien

Publikováno v: Synlett. 2011:1439-1443

N-Aryl-2-nitrosoanilines, easily availablefrom reaction of nitroarenes with anilide anions, undergo base-promotedcondensation reaction with substituted benzyl aryl sulfones, furnishing1,2-diaryl-1 H-benzimidazoles.

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https://doi.org/10.1055/s-0030-1260764

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ChemInform Abstract: Regioselective Aromatic Nucleophilic Substituted in N-Aryl-2-nitrosoanilines with Oxygen and Nitrogen Nucleophiles

Autor: Andrzej Kwast, Karolina Stachowska, Zbigniew Wrobel

Publikováno v: ChemInform. 44

Exclusive nucleophilic substitution of the leaving group para to the nitroso function takes place and renders possible the access to products which cannot be prepared by known methods.

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https://doi.org/10.1002/chin.201317053

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ChemInform Abstract: N-Aryl-2-nitrosoanilines as Intermediates in the Synthesis of Substituted Phenazines from Nitroarenes

Autor: Zbigniew Wróbel, Adam Trawczyński, Andrzej Kwast, Karolina Stachowska

Publikováno v: ChemInform. 43

Different reaction conditions are described for the reductive cyclization of nitrosoarenes of type (I) to give a variety of target compounds.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::11b20a545b3b62bbba39deb5c2b28e1c
https://doi.org/10.1002/chin.201213187

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ChemInform Abstract: N-Aryl-2-nitrosoanilines as Intermediates in the Two-Step Synthesis of Substituted 1,2-Diarylbenzimidazoles from Simple Nitroarenes

Autor: Andrzej Kwast, Karolina Stachowska, Krzysztof Grudzien, Zbigniew Wrobel

Publikováno v: ChemInform. 42

Nitroso-substituted diarylamines, previously prepared from nitrobenzenes and anilines, undergo base-mediated condensation with benzyl aryl sulfones to afford the title compounds generally in good yields.

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https://doi.org/10.1002/chin.201147105

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