Trifluoroacetic acid → 3(S)-(6-Methoxy-pyridin-3-yl)-3-[2-oxo-3-[3-(6,7,8,9-tetrahydro-5H-pyrido[2,3-b]azepin-2-yl)-propyl]-2,3-dihydro-imidazol-1-yl}-propionic acid

Participants

Reaction Steps

To a solution of 3-7 (0.85 g, 1.67 mmol) in dichloromethane (10 mL) was added anhydrous TFA (5 mL). After 4 hours, the mixture was concentrated, diluted with toluene, and re-concentrated. The residue was chromatographed on silica gel (15:10:1:1 to 15:10:1:1 EtOAc/EtOH(NH4OH/H2O) to give 600 mg of 3-8 as a white solid.

Provenance & Evidence