[Cl:1][C:2]1[CH:3]=[C:4]([NH:9][C:10]2[N:14]=[C:13]([NH2:15])[NH:12][N:11]=2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.[CH:16](=O)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.[BH4-].[Na+]>CO>[CH2:16]([NH:15][C:13]1[NH:12][N:11]=[C:10]([NH:9][C:4]2[CH:5]=[C:6]([Cl:8])[CH:7]=[C:2]([Cl:1])[CH:3]=2)[N:14]=1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1A solution of N3-(3,5-dichlorophenyl)-1H-1,2,4-triazole-3,5-diamine Intermediate 2 (70 mg, 287 μmol) and benzaldehyde (121.3 mg, 1.14 mmol) in MeOH (3 ml) was stirred at 45° C. for 2 days to give a suspension, cooled to −20° C. and was filtered to collect the solid. The solid was re-suspended in MeOH (5 ml), NaBH4 (65.1 mg, 1.72 mmol) was added and the reaction was stirred for 1 hour. The solvent was removed, and the reaction mixture was redissolved in EtOAc (5 ml) and washed with water (2×4 ml), dried over MgSO4 and concentrated in vacuo. Crystallization from DCM afforded a white solid as desired product (94 mg, 98% yield). MS +m/z: 334 (M+H)+
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