申请人:EASTMAN KODAK COMPANY
公开号:EP0794179A1
公开(公告)日:1997-09-10
2-(2'-Hydroxyphenyl)-2H-benzotriazoles of formula (I):
wherein:
R1, R2, R3, R4, R5, R6, R7, R8 and Z are defined in the specification, are prepared by catalytic hydrogenation of a suitable o-nitroazo dye compound in the presence of a PtS, Pt, Pd, Pt/Pd or other noble metal hydrogenation catalyst, in the presence of a base, an acid and a hydroxylic solvent.
式 (I) 的 2-(2'-羟基苯基)-2H-苯并三唑:
其中
R1、R2、R3、R4、R5、R6、R7、R8 和 Z 在说明书中定义,是在 PtS、Pt、Pd、Pt/Pd 或其他贵金属氢化催化剂存在下,在碱、酸和羟基溶剂存在下,通过催化氢化合适的邻硝基偶氮染料化合物制备的。