[CH3:1][O:2][C:3]1[CH:16]=[C:15]([N+:17]([O-:19])=[O:18])[CH:14]=[CH:13][C:4]=1[O:5][C:6]1[CH:11]=[CH:10][N:9]=[C:8]([NH2:12])[CH:7]=1.CCN(C(C)C)C(C)C.[CH3:29][O:30][CH2:31][C:32](Cl)=[O:33].N>C1COCC1.CO>[CH3:29][O:30][CH2:31][C:32]([NH:12][C:8]1[CH:7]=[C:6]([O:5][C:4]2[CH:13]=[CH:14][C:15]([N+:17]([O-:19])=[O:18])=[CH:16][C:3]=2[O:2][CH3:1])[CH:11]=[CH:10][N:9]=1)=[O:33]
To a suspension of 4-(2-methoxy-4-nitrophenoxy)pyridin-2-amine (233 mg, 0.892 mmol) in THF (5.0 mL) and DIPEA (775 μL, 6.12 mmol) at 0° C. was added 2-methoxyacetyl chloride (325 μL, 3.57 mmol) in a single portion. The reaction mixture was warmed to RT for 1 hr and then a solution of NH3 in MeOH (7M, 2.0 mL) was added. After 30 min at RT the mixture was evaporated in vacuo and the residue was partitioned between DCM (50 mL) and brine (40 mL). The organic phase was separated and dried (MgSO4) and was evaporated in vacuo. The residue was purified by flash column chromatography (SiO2, 40 g, 2% MeOH in DCM, isocratic elution) to afford 2-methoxy-N-(4-(2-methoxy-4-nitrophenoxy)pyridin-2-yl)acetamide as an orange oil (234 mg, 78%); Rt 1.89 min (Method 2); m/z 334 (M+H)+ (ES+).
Wird geladen…
