作者:Karl-Heinz Etzbach、Heinz Eilingsfeld
DOI:10.1055/s-1988-27603
日期:——
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.
从马来酰亚胺合成五元杂环 新的含有马来酰亚胺构建块的杂环通过2-氯-3-氰基马来酰亚胺或2,3-二氯马来酰亚胺作为关键中间体制备而成。在这些制备的杂环胺中,以下系统可作为制备分散染料的重氮组分:5-氨基吡唑-3,4-二羧亚胺5,4-氨基-5-烷氧基羧基噻吩-2,3-二羧亚胺7,5-氨基异噻唑-3,4-二羧亚胺9,5-氨基异噻唑-3,4-二羧酰胺(10),5-氨基-3,4-二氰基异噻唑(12),5-氨基-4-氰基噻吩-2,3-二羧亚胺15,以及2-氨基噻唑-4,5-二羧亚胺17。