[C:1](OC(N1CCC(O)CC1)=O)([CH3:4])([CH3:3])[CH3:2].[C:15](=[O:18])([O-:17])[O-:16].[Cs+].[Cs+].C[N:22](C=O)C>FC1C=CC(C(F)(F)F)=CC=1>[C:15]([O:17][NH2:22])([O:16][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:18]Part A: A solution of N-(tert-butyloxycarbonyl)-4-piperidinol (5.00 g, 2.48 mmol), 4-fluorobenzo-trifluoride (3.46 mL, 2.73 mmol), and cesium carbonate (12.1 g, 3.72 mmol) in DMF (60 mL) was heated at 120 degrees Celsius under an atmosphere of nitrogen for 2 days. The mixture was concentrated, diluted with H2O, and extracted with ethyl acetate. The organic layer was washed with H2O and brine, dried with MgSO4, and concentrated in vacuo. Chromatography (on silica, ethyl acetate/hexane) provided the BOC-aminoether as a white solid (6.97 g, 81%); Anal. calculated. for C17H22NO3F3: C, 59.12; H, 6.42; N, 4.06. Found: C, 59.29; H, 6.47; N, 3.99.
Wird geladen…
