Cyclopentylamine → HCID 68319152, compound

Participants

Reaction Steps

To a mixture of (2R,3R)-2-(tert-butoxycarbonylamino)-3-methylpentanoic acid (0.5 g, 2.162 mmol, HATU (0.986 g, 2.59 mmol) and cyclopentanamine (0.427 mL, 4.32 mmol) in DCM (10 mL) was added Et3N (0.603 mL, 4.32 mmol). The reaction mixture was stirred at room temperature for 5 h and then washed with saturated aqueous NaHCO3 and brine. The organics were dried over MgSO4 and concentrated. Purification by silica column chromatography (MeOH/DCM, 0-10%) afforded the title compound (0.56 g, 87%). 1H NMR (400 MHz, CDCl3) δ 0.82-0.89 (m, 3 H) 0.92 (t, J=7.45 Hz, 3 H) 1.32-1.41 (m, 6 H) 1.44 (s, 9 H) 1.55-1.77 (m, 3 H) 1.84-2.04 (m, 2 H) 2.99 (d, J=4.29 Hz, 1 H) 3.96 (dd, J=8.72, 5.43 Hz, 1 H) 4.21 (dt, J=13.89, 6.95 Hz, 1 H) 5.02 (br. s., 1 H) 5.93 (br. s., 1 H).

Provenance & Evidence