Triethylamine → tert-butyl 3-(1H-1,2,4-triazol-1-ylmethyl)-1-piperazinecarboxylate

Participants

Reaction Steps

To a suspension of 2-(1H-1,2,4-triazol-1-ylmethyl)piperazine dihydrochloride (104 mg, 0.39 mmol) and Et3N (157.7 mg, 1.56 mmol) in CH2Cl2 (3 ml) was added [{[(tert-butoxy-carbonyl)oxy]amino}(cyano)methyl]benzene (106.5 mg, 0.43 mmol). The mixture was stirred for 2 hours at room temperature. The solvent was evaporated in vacuo, and the residue was purified by column chromatography on silica gel (MeOH/CHCl3= 1/50- 1/10) to give tert-butyl 3-(1H-1,2,4-triazol-1-ylmethyl)-1-piperazinecarboxylate (50.9 mg, 48.9%): HPLC-MS (ESI): Calcd for C, H20N6O2 [M+H]+ 268, found: 268.

Provenance & Evidence