Benzylamine → HCID 57835543, compound

Participants

Reaction Steps

HBTU (400 mg, 1.03 mmol, 1.2 equiv.) is added to a solution of (2S,4S,5S,7S)-5-tert-butoxycarbonylamino-4-(tert-butyl-dimethyl-silanyloxy)-2-isopropyl-7-[4-methoxy-3-(3-methoxy-propoxy)-benzyl]-8-methyl-nonanoic acid (575 mg, 0.86 mmol, 1.0 equiv.) in acetonitrile (CH3CN) (15 mL) and DMF (1 mL) at 0° C. After 5 minutes, a solution of benzylamine (94 μL, 0.86 mmol, 1.0 equiv.) and Net3 (1.2 mL, 8.6 mmol, 10 equiv.) in CH3CN (3 mL) is added and the reaction mixture is stirred at room temperature for 5 minutes. For workup EtOAc is added and the organic layer is washed with 1 N HCl, a saturated solution of sodium bicarbonate (NaHCO3) and brine. Drying (Na2SO4) of the organic phase and evaporation of the solvent affords the crude product which is purified by flash column chromatography [50 g SiO2, hexane:EtOAc (4:1)] to afford the desired product as a colorless foam. MS (LC-MS): 780.4 [M+Na]+; Rf [hexane:EtOAc (1:1)]: 0.65 minutes.

Provenance & Evidence