作者:Benjamin Ezema、Chidimma Ezema、Jude Ayogu、David Ugwu、Efeturi Onoabedje
DOI:10.13005/ojc/310114
日期:2015.3.28
Tetraaza benzoxazinophenothiazine heterocyclic rings were synthesized and characterized. The key intermediate, 11-amino-6-chlorobenzo[a]-8,10-diazaphenoxazin-5-one was prepared by reaction of 4,5-diamino-6-hydroxypyimidine with 2,3-dichloro-1,4-naphthoquinone in anhydrous sodium carbonate. Whereas the parent tetraaza derivatives: 15-amino-8-bromo-6,9,12,14-tetraazabenzo[a][1,4]benzoxazino[3,2-c] phenothiazine, 9,15-diamino-6,8,12,14-tetraazabenzo[a][1,4]benzoxazino[3,2-c]pheno- thiazine and 15-amino-6,8,12,14-tetraazabenzo[a][1,4]benzoxazino[3,2-c]phenothiazine were synthesized by base catalyzed condensation reactions of 11-amino-6-chlorobenzo[a]-8,10-diazaphenoxazin-5-one with 2-amino-5-bromopyrazin-3-thiol, 4,6-diaminopyrimidine-5-thiol and 4-diaminopyrimidine-5-thiol respectively. The compounds are intensely coloured and are readily reduced with sodium dithionite to their leuco bases which can make them applicable as vat dyes. Their wash fastness, sublimation fastness and staining undyed fabric were evaluated.
合成了四氮苯并恶嗪吩噻嗪杂环并对其进行了表征。关键的中间体 11-氨基-6-氯苯并[a]-8,10-二氮吩恶嗪-5-酮是由 4,5-二氨基-6-羟基吡脒与 2,3-二氯-1,4-萘醌在无水碳酸钠中反应制备的。而母体四氮杂吲哚衍生物:15-amino-8-bromo-6,9,12,14-tetraazabenzo[a][1,4]benzoxazino[3,2-c] phenothiazine, 9,15-diamino-6,8,12,14-tetraazabenzo[a][1,4]benzoxazino[3,2-c]pheno- thiazine and 15-amino-6,8,12,14-tetraazabenzo[a][1,4]benzoxazino[3,和 15-氨基-6,8,12,14-四氮苯并[a][1,4]苯并恶嗪并[3,2-c]吩噻嗪分别是通过 11-氨基-6-氯苯并[a]-8,10-二氮苯并恶嗪-5-酮与 2-氨基-5-溴吡嗪-3-硫醇、4,6-二氨基嘧啶-5-硫醇和 4-二氨基嘧啶-5-硫醇的碱催化缩合反应合成的。这些化合物颜色浓烈,很容易用连二亚硫酸钠还原成它们的亮基,因此可用作桶装染料。 对它们的耐洗牢度、升华牢度和对未染色织物的染色性进行了评估。