Lithium Hydroxide → HCID 22147932, compound

Participants

Reaction Steps

To 3-tert-Butoxycarbonylamino-2-(3,4-dichloro-phenyl)-propionic acid methyl ester (17.11 g, 0.049 mol) in tetrahydrofuran-water (200 ml of each) was added lithium hydroxide (1.18 g, 0.049 mol). The reaction mixture was stirred at room temperature for 6 hours. THF was removed in vacuo and the pH was adjusted to pH 4 with 2M hydrochloric acid. The aqueous phase was extracted with EtOAc (3×100 ml). The combined organic phases were dried (MgSO4) and concentrated in vacuo. The title compound was obtained as a foam in 89% yield (14.67 g). 1H NMR (400 MHz, DMSO-d6) δ 1.30 (9H, s), 3.22–3.35 (1H, m), 3.35–3.50 (1H, m), 3.76 (1H, t), 6.84 (1H, t), 7.24 (1H, m); 7.48 (1H, s), 7.58 (1H, d), 12.85 (1H, s); MS (ES+): m/e=334.2 (8%); MS (ES−): m/e=332.2 (100%), 334.1 (65%), 336.1 (10%).

Provenance & Evidence