一种新的4,6-二氨基间苯二酚盐酸盐的制备方法及与对苯二甲酸的缩合聚合

A New Method for Synthesis of DAR·2HCl and Its Polymerization with Terephthalic Acid

以间苯二酚为原料 ,通过乙酰化、肟化、 Beckmann重排、水解反应制备 4,6-二胺基间苯二酚盐酸盐( DAR· 2 HCl) ,并用 FTIR,MS,元素分析 ,1 H NMR和 1 3C NMR等对 DAR· 2 HCl及中间体进行了表征 .同时 ,将 DAR· 2 HCl和对苯二酸 ( TPA)成盐 ,然后进行缩聚得到具有较高分子量的 PBO.通过 FTIR和固体 1 3C NMR表征了 PBO的结构 ,并研究了

A new method for synthesizing 4,6 diaminoresorcinol dihydrochloride(DAR·2HCl) was adopted by three steps, which will give DAR·2HCl without involving any nitro or halo compound but in high yields and high regioselectivity. In the first step, the resorcinol was reacted with acetic anhydride to give the 4,6 diacylresorcinol, then followed by the oximation of 4,6 diacylresorcinol to form the dioxime with the addition of hydroxylamine hydrochloride, finally, the dioxime was subject to producing DAR·2HCl by Be...