[CH3:1][O:2][C:3]([C:5]1[C:6]([C:16]([OH:18])=O)=[N:7][N:8]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[N:9]=1)=[O:4].[C:19](N1C=CN=C1)([N:21]1C=CN=[CH:22]1)=O.CNC>CN(C=O)C>[CH3:19][N:21]([CH3:22])[C:16]([C:6]1[C:5]([C:3]([O:2][CH3:1])=[O:4])=[N:9][N:8]([C:10]2[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=2)[N:7]=1)=[O:18]A solution of 5-methoxycarbonyl-2-phenyl-2H-1,2,3-triazole-4-carboxylic acid (0.203 g, 0.82 mmol) in dry DMF (3 mL) at 23° C. was treated with carbonyldiimidazole (0.146 g, 0.90 mmol). The resulting mixture was stirred for 1.5 h at 23° C., cooled to 0° C. and treated with dimethylamine (2.0 M in THF, 2.05 mL, 4.10 mmol). The resulting mixture was allowed to warm to 23° C. over 16 h and concentrated in vacuo. The residue was partitioned between water and EtOAc. The aqueous layer was extracted with an additional portion of EtOAc. The combined organic extracts were washed with HCl (1 M), brine, NaHCO3 (sat. aq. sol.) and brine, dried over MgSO4 and concentrated in vacuo. The residue was purified by filtering it through a silica gel plug (EtOAc-hexanes 50:50) to afford 0.201 g (89%) of methyl 5-(N,N-dimethylcarbamoyl)-2-phenyl-2H-1,2,3-triazole-4-carboxylate.
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