Hydrochloric Acid → HCID 57890189, compound

Participants

Reaction Steps

2-[(5-{1-Ethyl-1-[4-(2-ethyl-2-hydroxy-butoxy)-3-methyl-phenyl]-propyl}-3-methyl-thiophene-2-carbonyl)-amino]-acetic acid methyl ester (Example 52) (0.34 g, 0.69 mmol) is dissolved in MeOH (2 mL), treated with H2O (0.5 mL) and NaOH (0.14 g, 3.47 mmol) and the resulting mixture is heated at a reflux for two hours cooled to at ambient temperature and stirred overnight. The solution is diluted with H2O (10 mL), the pH value is adjusted to about 3-4 using 1 M HCl, it is extracted with EtOAc (40 mL). The EtOAc layer is washed with brine (20 mL), dried with MgSO4, filtered and concentrated to yield the titled compound (0.244 g, 0.51 mmol, 74%). 1H NMR (CD3OD), δ 0.72 (t, J=7.4 Hz, 6H), 0.94 (t, J=7.4 Hz, 6H), 1.64-1.74 (m, 4H), 2.03-2.20 (m, 4H), 2.18 (s, 3H), 2.44 (s, 3H), 3.79 (s, 2H), 3.97-3.99 (m, 2H), 6.71 (s, 1H), 6.79 (d, J=8.2 Hz, 1H), 6.99-7.02 (m, 1H), 7.06-7.10 (m, 1H), 7.88-7.94 (t, J=5.7 Hz, 1H). LC/MS (m/z): calcd. for C26H36NO5S (M−H)−: 475.6; found: 474.3

Provenance & Evidence