“…Obtained as a colourless oil (0.28 g, 71%). ν max (neat) 3271 br, 2965 s, 1797 s, 1743 s and 1679 cm −1 m; [α] D 20 -21.0 (c = 0.1, CH 2 Cl 2 ) (lit [ 66 ]. [α] D 20 -24.1 (c=0.1, CH 2 Cl 2 )); δ H 1.6–2.5 (8H, m, (CH 2 ) 4 ), 5.1-5.2 (5H, m, 2 × CH 2 Ph and NCH), 6.88 (1H, br, NH), 7.3–7.5 (10H, m, ArH); δ C (75 MHz) 24.4 (CH 2 ), 26.7 (CH 2 ), 30.8 (CH 2 ), 41.2 (CH 2 ), 66.5 (2 × OCH 2 Ph), 67.9 (NCH), 127.7 (ArCH), 128.0 (ArCH), 128.1 (ArCH), 128.2 (ArCH), 128.5 (2 × ArCH), 135.9 (2 × ArC), 156.3 (2 × NCO 2 ), 206.9 (CO); HPLC (Chiralpak OD-H using hexane: i PrOH (90:10) as solvent at a flow rate of 0.9 mL/min) retention times 16.9 (minor) and 22.6 (major) minutes.…”