申请人:Daicel Chemical Industries, Ltd.
公开号:EP0878234A2
公开(公告)日:1998-11-18
A substrate is contacted with oxygen in the presence of the imide compound shown by the following formula (1) (N-hydroxyphthalimide) and a strong acid, or the imide compound, the strong acid and a co-catalyst (e.g., a transition metal compound) to oxygenate the substrate with high conversion and selectivity:
wherein R1 and R2 represent a substituent such as a hydrogen atom or a halogen atom, an alkyl group, an aryl group or a cycloalkyl group, or R1 and R2 may bond together to form a double bond or an aromatic or nonaromatic ring, X is O or OH, and n is 1 to 3.
The substrate comprises, for example, at least one compound selected from (a) a compound having a methyl group or a methylene group at an adjacent site of an unsaturated bond, (b) a homo- or hetero cyclic compound having a methylene group, (c) a compound having a methine carbon atom, (d) a compound having a methyl group or a methylene group at an adjacent site of an aromatic ring and (e) a compound having a methyl group or a methylene group at an adjacent site of a carbonyl group.
在下式(1)所示亚胺化合物(N-羟基邻苯二甲酰亚胺)和强酸,或亚胺化合物、强酸和助催化剂(如过渡金属化合物)存在下,底物与氧气接触,以高转化率和高选择性使底物氧合:
其中 R1 和 R2 代表取代基,如氢原子或卤素原子、烷基、芳基或环烷基,或 R1 和 R2 可键合在一起形成双键或芳环或非芳环,X 为 O 或 OH,n 为 1 至 3。
例如,底物包括至少一种选自以下的化合物:(a) 在不饱和键的邻接位上具有甲基或亚甲基的化合物;(b) 具有亚甲基的同环或杂环化合物;(c) 具有甲基碳原子的化合物;(d) 在芳香环的邻接位上具有甲基或亚甲基的化合物;(e) 在羰基的邻接位上具有甲基或亚甲基的化合物。