2，6-二（对氨基苯）苯并［1，2-d；5，4-d′］二噁唑的合成

摘要

2,6-Di(p-amino phenyl)benzo[1,2-d;5,4-d′]bisoxazole was synthesized by condensation polymerization of 4 ,6-diaminoresorcinol diphosphate salt with p-aminobenzoic acid in poly-( phosphoric acid), using SnCl2· 2H2O as reductant.The structure was confirmed by 1H NMR and FT-IR.The optimum reaction conditions were as followed:the concentration of P 2 O5 in PPA was 84%and the dos-age of SnCl2· 2H2O was 8 wt%, reaction at 200 ℃ for 4 h in nitrogen atmosphere, the yield was 97%.TG analysis showed that the initial decomposition temperature of DIABO was 401 .0 ℃.%以4，6-二氨基间苯二酚二磷酸盐和对氨基苯甲酸为原料，在多聚磷酸中，添加还原剂SnCl2·2H2 O，经缩聚反应合成了有机二胺单体———2，6-二（对氨基苯）苯并[1，2-d；5，4-d′]二噁唑（DIABO），其结构经1H NMR和FT-IR确证。最佳反应条件为：10．01 mol， PPA中P2 O5质量分数为84％， SnCl2·2H2 O用量为8 wt％，在氮气保护下于200℃反应4 h ，产率97％。 TG研究结果表明：DIABO的起始分解温度为401．0℃。