3,3-Dimethylbutylamine → 3-[Benzyl-(1-phenyl-ethyl)-amino]-3-cyclohexyl-N-(3,3-dimethyl-butyl)-propionamide

Participants

Reaction Steps

A mixture of 3,3-dimethyl butylamine (0.6 mL, 4.2 mmol), 3-[benzyl-(1-phenyl-ethyl)-amino]-3-cyclohexyl-propionic acid (1.83 g, 3.8 mmol), HBTU (2.2 g, 5.7 mmol), DIPEA (1.5 mL, 8.6 mmol) and DMF (25 mL) was stirred at room temperature for 14 hours. To the reaction mixture was then added sodium bicarbonate(s) (100 mL) and the desired product was extracted with ethyl acetate (100 mL×2). The combined organic layers were washed with water, dried over MgSO4 and concentrated to yield a solid. The solid was purified by column chromatography (10% EtOAc/heptane) to yield a residue.

Provenance & Evidence