申请人:Mitsui Chemicals, Incorporated
公开号:US06359180B1
公开(公告)日:2002-03-19
The present invention relates to a novel production method of 4,6-diaminoresorcin, and to 2-sulfonic acid-4,6-dinitroresorcin as its intermediate and salts thereof. The target compound is obtained by (R1) sulfonating resorcin (A) to obtain resorcin 2,4,6-trisulfonate (B), (R2) nitrating the compound (B) to obtain 2-sulfonic acid-4,6-dinitroresorcin (C), (R3) hydrolyzing the compound (C) to obtain 4,6-dinitroresorcin (D), and finally (R4) reducing the compound (D) to obtain 4,6-diaminoresorcin (E):
本发明涉及一种新型的4,6-二氨基邻苯二酚的生产方法,以及以其中间体2-磺酸基-4,6-二硝基邻苯二酚及其盐。目标化合物通过以下步骤获得:(R1) 对邻苯二酚(A)进行磺化以获得邻苯二酚2,4,6-三磺酸盐(B),(R2) 对化合物(B)进行硝化以获得2-磺酸基-4,6-二硝基邻苯二酚(C),(R3) 对化合物(C)进行水解以获得4,6-二硝基邻苯二酚(D),最后(R4) 还原化合物(D)以获得4,6-二氨基邻苯二酚(E)。