Synthesis of 3-hydroperoxyindolin-2-ones and oxidation of sulphides to suiphoxides by 3-hydroperoxyindolin-2-ones
Abstract
The 3-hydroperoxyindolin-2-ones 2 were prepared in moderate yields by the dye-sensitized photooxidation of the indolin-2-ones 1. The 3-hydroperoxyindolin-2-ones 2 thus obtained oxidized a series of sulphides 4 selectively to the corresponding sulphoxides 5 without further oxidation to the sulphone.