申请人:Degussa-Hüls Aktiengesellschaft
公开号:EP1086938A2
公开(公告)日:2001-03-28
The invention is directed to a process of the oxidation of alcohols with the aid of a nitroxyl radical of the general formula (I)
wherein R1, R2, R3, R4, R5, R6 are independent of each other (C1-C8)-alkyl, (C1-C8)-alkoxy, (C6-C18)-aryl, (C7-C19)-aralkyl, (C6-C18)-aryl-(C1-C8)-alkyl, (C3-C18)-heteroaryl, (C4-C19)-heteroaralkyl, (C3-C18)-heteroaryl-(C1-C8)-alkyl, (C3-C8)-cycloalkyl, (C3-C8)-cycloalkyl-(C1-C8)-alkyl, (C1-C8)-alkyl-(C3-C8)-cycloalkyl,
or R5 and R6 are bonded together via a (C1-C3)-alkyl chain, which can be substituted by one or more R1, N[(C1-C8)-alkyl]2, (C1-C8)-amido, (C1-C8)-alkyloxy carboxyl, (C6-C18)-aryloxy carboxyl, nitrile, Hal, =O, part of a polymer, and a co-oxidant. Primary alcohols are oxidised preferably compared to secondary ones.
本发明涉及一种借助通式(I)的硝基氧化醇的工艺
其中 R1、R2、R3、R4、R5、R6 相互独立为(C1-C8)-烷基、(C1-C8)-烷氧基、(C6-C18)-芳基、(C7-C19)-芳烷基、(C6-C18)-芳烷基-(C1-C8)-烷基(C3-C18)-异芳基、(C4-C19)-异烷基、(C3-C18)-异芳基-(C1-C8)-烷基、(C3-C8)-环烷基、(C3-C8)-环烷基-(C1-C8)-烷基、(C1-C8)-烷基-(C3-C8)-环烷基、
或 R5 和 R6 通过(C1-C3)-烷基链结合在一起,该链可被一个或多个 R1、N[(C1-C8)-烷基]2、(C1-C8)-
氨基、(C1-C8)-烷氧基羧基、(C6-C18)-芳氧基羧基、腈、Hal、=O、聚合物的一部分和助氧化剂取代。与仲醇相比,伯醇更容易被氧化。