PDF icon PDF herunterladen
Synthesis 1988; 1988(6): 449-452
DOI: 10.1055/s-1988-27603
paper
© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

Synthese von 5-Ring-Heterocyclen aus Maleinimiden

Karl-Heinz Etzbach* , Heinz Eilingsfeld
  • *Farbenlaboratorium der BASF AG, D-6700 Ludwigshafen, Federal Republic of Germany
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
20. August 2002 (online)

 als PDF herunterladen  Lizenzen und Reprints Alle Artikel dieser Rubrik
Preview

Synthesis of Five-Membered Heterocyles from Maleimides New heterocycles containing maleimide building blocks were prepared via 2-chloro-3-cyanomaleimide or 2,3-dichloromaleimides as key intermediates. Of the heterocyclic amines thus prepared, the following systems are useful as diazo components for preparing disperse dyes: 5-aminopyrazole-3,4-dicarboximides 5, 4-amino-5-alkoxycarbonylthiophene-2,3-dicarboximides 7, 5-aminoisothiazole-3,4-dicarboximides 9, 5-aminoisothiazole-3,4-dicarboxamide (10), 5-amino-3,4-dicyanoisothiazole (12), 5-amino-4-cyanothiophene-2,3-dicarboximides 15, and 2-aminothiazole-4, 5-dicarboximides 17.