Unsymmetrical halogen-substituted diacyl peroxides have been prepared either by rapidly adding an .alpha.-halogen-substituted aliphatic acyl halide and a hydrocarbon solvent to an aqueous solution of an alkali metal peroxide followed by portion-wise addition of an acyl halide or by rapidly adding an acyl halide and a hydrocarbon solvent to an aqueous solution of an alkali metal peroxide followed by portion-wise addition of an .alpha.-halogen-substituted aliphatic acyl halide. The formation of diacyl peroxides and symmetrical halogenated diacyl peroxides as by-products is minimized by either technique.
非对称卤代二酰过氧化物可以通过以下两种方法制备:一种是将α-卤代脂肪
酰卤和烃溶剂迅速加入碱
金属过氧化物的
水溶液中,然后逐渐加入
酰卤;另一种是将
酰卤和烃溶剂迅速加入碱
金属过氧化物的
水溶液中,然后逐渐加入α-卤代脂肪
酰卤。这两种方法都可以最小化二酰过氧化物和对称卤代二酰过氧化物的副产物的形成。