A highly efficient protocol for the synthesis of 3-sulfenylindoles
in moderate to excellent yields via the reaction of indoles with
unsymmetric benzothiazolyl-containing disulfides is described. Copper(I)
iodide is used as the catalyst and the reactions take place at room
temperature. The by-product, 2-mercaptobenzothiazole, can be easily
recovered and reused.
indoles - 3-sulfenylindoles - sulfur - copper(I)
iodide - unsymmetric disulfides