[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:11][CH:10]([OH:12])[CH2:9]2)=[C:4]([F:13])[CH:3]=1.N1C=CC=CC=1.Cl[C:21]([O:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[O:22]>CC(C)=O>[F:13][C:4]1[CH:3]=[C:2]([NH:1][C:21](=[O:22])[O:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[CH:7]=[CH:6][C:5]=1[N:8]1[CH2:9][CH:10]([OH:12])[CH2:11]1To a stirred solution of 1-(4-amino-2-fluorophenyl)azetidin-3-ol (1.8 g, 9.94 mmol, 1.0 eq) in acetone (50 mL) was added pyridine (1.57 g, 19.87 mmol, 2.0 eq) and phenyl chloroformate (1.71 g, 10.89 mmol, 1.1 eq) and stirred at RT for 2 h. The reaction mixture was evaporated, diluted with EtOAc (100 mL), washed with water (100 mL) followed by brine and evaporated. The residue obtained was purified by CC (eluent: EtOAc/PE (1:4)) to obtain phenyl 3-fluoro-4-(3-hydroxyazetidin-1-yl)phenylcarbamate (2.3 g, 76%, brown solid) (TLC: EtOAc/PE (1:1), Rf: 0.45).
Wird geladen…
