[C:1]1([SH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(=O)([O-])[O-].[Cs+].[Cs+].[F-].[Cs+].Cl[CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][N:19]=1>CN(C=O)C>[C:1]1([S:7][CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][N:19]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1Thiophenol 2(2) (2.77 g, 0.025 mol), cesium carbonate (24.65 g, 0.075 mol) and catalytical amount of cesium fluoride were added successively to a solution of 2-chloromethylpyridine 6(1) (1.13 g, 0.017 mol) in absolute DMF (28 ml). The reaction mixture was stirred at 50-60° C. for 2 h in argon current and left for night at 20° C. Solvent was removed in vacuo, the residue was dissolved in water, the reaction product was extracted with CH2Cl2, dried over MgSO4, solvent was evaporated in vacuo. It gave 2-phenylsulphanylmethylpyridine 6(2), 3.2 g, (95%).
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