In the presence of a catalytic system comprising a cyclic base and a complex of a transition metal with an N,N'-disalicylidenediamine, ketoisophorone or a derivative thereof is produced by oxidizing β-isophorone or a derivative thereof with molecular oxygen with controlling the water content of a reaction system to 1% by weight or less at the initial stage of the reaction. Moreover, the above catalytic system further comprises a basic nitrogen-containing compound. The complex may be an N,N'-disalicylidene C2-5 alkylenediamine complex with manganese, iron, cobalt, copper, or vanadium. The cyclic base may be an alicyclic or aromtaic compound having at least two nitrogen atoms. As the basic nitrogen-containing compound, a Schiff base such as an imino compound and an anil compound can be used. The proportion of the nitrogen-containing compound to the complex is about 0.1/1 to 20/1 (molar ratio). With the above oxydation catalytic system, there can be obtained ketoisophorone and derivatives thereof with high efficiency.
在由环状碱和过渡
金属与 N,N'-二
水杨醛二胺的络合物组成的催化体系存在下,通过在反应初始阶段将反应体系中的
水含量控制在 1%(重量)或以下,用分子氧氧化 β-
异佛尔酮或其衍
生物,生成酮
异佛尔酮或其衍
生物。此外,上述催化体系还包括一种碱性
含氮化合物。该络合物可以是 N,N'-二
水杨醛 C2-5 烷二胺与
锰、
铁、
钴、
铜或
钒的络合物。环状碱可以是具有至少两个氮原子的脂环族或芳香族化合物。作为基本的
含氮化合物,可以使用希夫碱,如
亚胺化合物和
苯胺化合物。
含氮化合物与络合物的比例约为 0.1/1 至 20/1(摩尔比)。利用上述氧化催化体系,可以高效地获得酮基
异佛尔酮及其衍
生物。