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2 results on '"Trawczyński, Adam"'

1. Expedient Synthesis of 6-Acylindolo[1,2-a]quinoxalines.

Author

Trawczyński, Adam, Telega, Magdalena, and Wróbel, Zbigniew

Subjects
*QUINOXALINES, *CHEMICAL synthesis, *HETEROCYCLIC compounds, *CHEMICAL reactions, *KETONES
Abstract

A novel route leading to 6-acylindolo[1,2-a]quinoxalines involving condensation of N-(2-iodoaryl)-2-nitrosoanilines with β-diketones followed by Heck cyclization is described. [ABSTRACT FROM AUTHOR]

Published
2015
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2. N-Aryl-2-nitrosoanilines as intermediates in the synthesis of substituted phenazines from nitroarenes

Author

Kwast, Andrzej, Stachowska, Karolina, Trawczyński, Adam, and Wróbel, Zbigniew

Subjects
*ORGANIC synthesis, *NITROANILINE, *INTERMEDIATES (Chemistry), *SUBSTITUTION reactions, *NITROAROMATIC compounds, *RING formation (Chemistry), *ACETAMIDE, *PHENAZINE, *ORGANIC solvents
Abstract

Abstract: 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 aprotic solvents, and by acetic acid. The method is illustrated by the synthesis of 1-methoxyphenazine, a precursor of pyocyanine, starting from the appropriate nitroarene–aniline pairs. [Copyright &y& Elsevier]

Published
2011
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