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- W2047316141 abstract "On the Synthesis of 3-Amino-pyrroles by Thorpe-Ziegler-Cyclization N-Aryl and alkylaminomethylene cyanacetic acid derivatives 1 react with α-halogencarbonyl compounds 2 in the presence of potassium carbonate/sodium ethoxide to yield the substituted 3-amino-pyrroles 6. Using the same principle of cyclization pyrrole derivatives 6 can also be obtained by reaction of β-chloro- and β-alkoxymethylenemalononitriles 4 with β-aminocarbonyl compounds 5. From the malononitrile derivatives 1 containing the methylthio group in the β-position, and α-halogen ketones 7, the 2-dicyanomethylene oxazolines 8 arise which undergo alkoholysis by treatment with sodium alkoxide to form the 3-amino-5-alkoxy-pyrrole derivatives 9." @default.
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- W2047316141 date "1992-01-01" @default.
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- W2047316141 title "Zur Synthese von 3-Amino-pyrrolen durch Thorpe-Ziegler-Cyclisierung" @default.
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- W2047316141 doi "https://doi.org/10.1002/prac.19923340608" @default.
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