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With N-Bromosuccinimide; In tetrahydrofuran; at 40℃; for 1h;Inert atmosphere;
A mixed solution of NBS (N-bromosuccinimide) / THF was added dropwise to a reaction flask equipped with 1 mol of A,In the nitrogen protection conditions heated to 40C for 1 hour, the bromination reaction to be B.then,JoinDibenzo-substituted disulfideDiphenyl disulfide compound Ph-S-S-Ph,The compound C was obtained by sufficiently stirring for half an hour with n-BuLi / THF as a catalyst in a low-temperature dry ice bath.Finally, a mixed solution of meta-chlorobenzoic acid mCPBA / CH2Cl2 was introduced, and the mixture was stirred for 1 hour,Add water, precipitate solid,Followed by recrystallization using n-hexane and ethanol to obtain SDF-DPSO2 in a yield of 38percent.