Hydrochloric Acid → 4-(5-chloro-2-oxo-4-(piperidin-4-yloxy)pyridin-1(2H)-yl)-2-fluorobenzonitrile
反応式
[Cl:1][C:2]1[C:3]([O:18][CH:19]2[CH2:24][CH2:23][N:22](C(OC(C)(C)C)=O)[CH2:21][CH2:20]2)=[CH:4][C:5](=[O:17])[N:6]([C:8]2[CH:13]=[CH:12][C:11]([C:14]#[N:15])=[C:10]([F:16])[CH:9]=2)[CH:7]=1.Cl>CO>[Cl:1][C:2]1[C:3]([O:18][CH:19]2[CH2:20][CH2:21][NH:22][CH2:23][CH2:24]2)=[CH:4][C:5](=[O:17])[N:6]([C:8]2[CH:13]=[CH:12][C:11]([C:14]#[N:15])=[C:10]([F:16])[CH:9]=2)[CH:7]=1参加物
4
実験手順
A suspension of tert-butyl 4-(5-chloro-1-(4-cyano-3-fluorophenyl)-2-oxo-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylate (2.2 g, 4.18 mmol) in MeOH (15 mL) was added hydrogen chloride (4M in 1,4-dioxane) (0.609 g, 16.70 mmol) and stirred at rt. After 6 h stirring, solvent MeOH was evaporated and the resulting crude was diluted with EtOAc (50 mL). After saturated aqueous NaHCO3 was added to adjust PH>7, the resulting mixture was vigorously stirred for 2 h. The organic layers was collected and the aqueous layer was back-extracted with EtOAc 2×. The combined extracts were dried (Na2SO4) and evaporated under reduced pressure to give a brown solid as a crude product (1 g, 2.88 mmol). MS (ESI) 348 (M+H).