ClCCl.N1C=[CH:8][CH:7]=[C:6]([C:10]2[N:11]=[C:12]([SH:15])[NH:13][N:14]=2)[CH:5]=1.I[CH3:17].[CH2:18]([N:20](CC)CC)C>>[CH3:17][S:15][C:12]1[NH:13][N:14]=[C:10]([C:6]2[CH:5]=[CH:18][N:20]=[CH:8][CH:7]=2)[N:11]=1To a dichloromethane solution of 5-pyridin-3-yl-2H-[1,2,4]triazole-3-thiol (Step B, Example 1) triethylamine was added followed by iodomethane. This solution was stirred at room temperature for 2 h, during which period the reaction was complete by RP-HPLC. The solvent was evaporated and the residue was purified by RP-HPLC affording the desired intermediate.
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