高纯度4,6-二氨基间苯二酚盐酸盐的合成

从l，2，3-三氯苯出发合成了高纯度的4，6-二氨基间苯二酚盐酸盐，并采用FT-IR、元素分析、^1H NMR等方法对各步中间体及4，6-二氨基间苯二酚盐酸盐进行了表征分析．结果表明成功地制得了4，6-二硝基l，2，3-三氯苯及2-氯-4，6-二硝基-l，3-间苯二酚中间体，结合Na元素分析证实，以H3PO4水溶液代替普遍采用的HAc—NaAc水溶液为介质的加氢工艺有效地解决了4，6-二氨基间苯二酚盐酸盐无机盐污染问题，制得了合成聚对苯撑苯并二嗯唑(PBO)的高纯度单体——4，6-二氨基间苯二酚盐酸盐．

Synthesis of 4,6-diaminoresorcinol dihydrochloride with high purity

4,6-diaminoresorcinol dihydrochloride was prepared from 1,2,3-trichlorobenzene. Some analyses such as FT-IR, elemental analysis and 'HNMR were used to confirm the intermediates--1,2,3-tri-chloro-4, 6-dinitrobenzene and 2-chloro-4,6-dinitro-resorcinol, and the final product-4,6-diaminoresorcinol dihydrochloride. Furthermore the analysis of sodium quantity in the 4,6-diaminoresorcinol dihydrochloride showed that the contamination problem from some inorganic salts was solved effectively by using phosphoric acid aqueous medium instead of acetic acid -sodium acetate system in the catalytic hydrogenation step. As a result, the monomer for the synthesis of poly(p-phenylenebenzobisoxazole) (PBO) was obtained with high purity.