[C:1]([O:5][C:6](=[O:17])[CH2:7][O:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH:15]=O)[CH:10]=1)([CH3:4])([CH3:3])[CH3:2].[NH2:18][OH:19].Cl.N1C=CC=CC=1>CO>[C:1]([O:5][C:6](=[O:17])[CH2:7][O:8][C:9]1[CH:14]=[CH:13][CH:12]=[C:11]([CH:15]=[N:18][OH:19])[CH:10]=1)([CH3:4])([CH3:3])[CH3:2]To a solution of (3-formyl-phenoxy)-acetic acid tert-butyl ester (2.05 g, 8.68 mmol) in MeOH (30 mL) was added NH2OH.HCl (0.66 g, 9.54 mmol) and pyridine (3.5 mL, 43.4 mmol) and the reaction was stirred for 2 hours. The MeOH was removed in vacuo and the residue was diluted with EtOAc and 1N HCl. The layers were separated and the aqueous solution was washed with EtOAc. The combined organic layers were dried over MgSO4, filtered and concentrated in vacuo to afford the title compound (1.99 g). 1H NMR (400 MHz, CDCl3) δ 8.07 (s, 1H), 7.23-7.28 (m, 2H), 7.12 (m, 1H), 6.93 (d, 1H), 4.51 (s, 2H), 1.46 (s, 9H).
Wird geladen…
