Triethylamine → HCID 59176533, compound

Participants

Reaction Conditions

Reaction Steps

To a cold (0° C.) solution of Boc-Lys(Z)—OH (Bachem, 10.0 g, 26.3 mmol) in dimethylformamide (80 mL) was added hydroxybenzotriazole-hydrate (4.3 g, 31.6 mmol), triethylamine (7.3 mL, 52.6 mmol) and EDAC (6.1 g, 31.6 mmol). After stirring at 0° C. for 1 h, 2-aminomethylpyridine (3.0 mL, 28.9 mmol) was added to the mixture. The mixture was warmed to room temperature and stirred for an additional 17 h. The mixture was diluted with aqueous saturated NaHCO3 and extracted with ethyl acetate. The organic phase was dried (MgSO4), filtered and concentrated in vacuo. The crude residue was purified by silica gel chromatography (0% to 5% methanol/CHCl3) to afford the desired product 27: 1H NMR (d6-DMSO) δ 8.43 (d, J=4.0 Hz, 1H), 8.39 (t, J=5.6 Hz, 1H), 7.68 (t, J=7.6 Hz, 1H), 7.34-7.19 (m, 8H), 6.94 (d, J=7.6 Hz, 1H), 4.96 (s, 2H), 4.31 (d, J=5.6 Hz, 2H), 3.90-3.83 (m, 1H), 2.95-2.90 (m, 2H), 1.60-1.25 (m, 6H), 1.35 (s, 9H); ESI+ MS: m/z (rel intensity) 471.2 (100, [M+H]+).

Provenance & Evidence