Hydrochloric Acid → HCID 58313160, compound

Participants

Reaction Steps

To a solution of ethyl 2-{N-[(methyloxy)carbonyl]-L-valyl}-8-oxa-2-azaspiro[4.5]decane-3-carboxylate (102) (310 mg, 0.84 mmol) in a 2:1:1 mixture of THF/water/methanol (6 mL) was added lithium hydroxide monohydrate (70 mg, 1.67 mmol) and the reaction stirred at room temperature for 2 h. Treated with 1 N HCl (1.6 mL), partitioned between EtOAc and water (30 mL each), organic layer extracted with EtOAc (30 mL), dried (MgSO4) and concentrated to give a white foam (211 mg, 74% yield). This material was used in subsequent steps without additional purification. 1H NMR (400 MHz, DMSO-d6) δ ppm 12.43 (br. s., 1H) 7.19-7.41 (m, 1H) 4.05-4.28 (m, 1H) 3.91-4.05 (m, 2H) 3.40-3.71 (m, 6H) 3.20-3.28 (m, 1H) 1.81-1.98 (m, 2H) 1.70-1.80 (m, 1H) 1.46-1.69 (m, 2H) 1.32-1.46 (m, 1H) 0.65-1.03 (m, 10H).

Provenance & Evidence