Selective Oxidation of Acetophenones Bearing Various Functional Groups to Benzoic Acid Derivatives with Molecular Oxygen
作者:Ryota Nakamura、Yasushi Obora、Yasutaka Ishii
DOI:10.1002/adsc.200900099
日期:2009.7
Acetophenones substituted by alkyl, alkoxy, acetoxy, and halogen groups were selectively oxidized with molecular oxygen to the corresponding benzoic acids by using the N,N′,N′′‐trihydroxyisocyanuric acid (THICA)/cobalt(II) acetate [Co(OAc)2] and THICA/Co(OAc)2/manganese(II) acetate [Mn(OAc)2]. For example, 4‐methylacetophenone was selectively oxidized with molecular oxygen to 4‐acetylbenzoic acid (85%)
通过使用N,N',N''-三羟基异氰尿酸(THICA)/乙酸钴(II)[Co(OAc )2 ]和THICA / Co(OAc)2 /乙酸锰(II)[Mn(OAc)2 ]。例如,4-甲基苯乙酮被分子氧选择性地氧化为THICA / Co(OAc)2氧化为4-乙酰基苯甲酸(85%),被Mn(OAc)2氧化为4-甲基苯甲酸(93%),而对苯二甲酸被用THICA / Co(OAc)2 / Mn(OAc)2以93%的比例获得催化系统。有趣的是,芳香环上的乙酰基可通过极少量的Mn(OAc)2有效地转化为相应的羧酸,并且本方法提供了通向常规常规方法难以制备的乙酰基苯甲酸的通用途径方法。