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N-Substituierte Benzo [b]thiophen-3-acetamide und 3-(β-Aminoäthyl)-benzo [b]thiophene

  • Organic Chemistry and Biochemistry
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Zusammenfassung

Die Synthese der Titelverbindungen erfolgte über die Benzo[b]thiophen-3-essigsäure, deren Chlorid mit Diäthylamin und N-Methylpiperazin zu den entsprechenden N-substituierten Benzo[b]thiophen-3-acetamiden reagierte; diese wurden mit LiAlH4 zu tertiären Aminen reduziert.

Die Synthese der homologen 2-Methylverbindungen ging vom 2-Methyl-3-acetyl-benzo[b]thiophen aus: Haloformreaktion gab 2-Methyl-benzo[b]thiophen-3-carbonsäure;Wolff-Umlagerung des entsprechenden Diazomethylketons in Gegenwart von sekundären Aminen lieferte verschiedene N-substituierte 2-Methyl-benzo[b]thiophen-3-acetamide, von denen drei mit LiAlH4 zu tertiären Aminen reduziert wurden.

Abstract

The title substances were synthesized using benzo[b]thiophene-3-acetic acid as an intermediate, the acid chloride of which reacted with diethylamine and N-methylpiperazine to give the corresponding N-substituted benzo[b]thiophene-3-acetamides; these were reduced by LiAlH4 to tertiary amines.

The synthesis of the homologous 2-methyl compounds started from 2-methyl-3-acetyl-benzo[b]thiophene: haloform reaction gave 2-methyl-benzo[b]thiophene-3-carboxylic acid;Wolff-rearrangement of the corresponding diazomethyl ketone in the presence of secondary amines yielded various N-substituted 2-methyl-benzo[b]thiophene-3-acetamides; three of them were reduced by LiAlH4 to tertiary amines.

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Sauter, F., Golser, L. & Stütz, P. N-Substituierte Benzo [b]thiophen-3-acetamide und 3-(β-Aminoäthyl)-benzo [b]thiophene. Monatshefte für Chemie 98, 2089–2096 (1967). https://doi.org/10.1007/BF01167173

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  • DOI: https://doi.org/10.1007/BF01167173

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