3-Amino-1-(4-benzyloxy-2-fluorophenyl) pyrazoline → 3-Amino-1-(4-benzyloxy-2-fluorophenyl)-pyrazole
Reaction equation
[NH2:1][C:2]1[NH:3][N:4]([C:7]2[CH:12]=[CH:11][C:10]([O:13][CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)=[CH:9][C:8]=2[F:21])[CH2:5][CH:6]=1>C(Cl)Cl.O=[Mn]=O>[NH2:1][C:2]1[CH:6]=[CH:5][N:4]([C:7]2[CH:12]=[CH:11][C:10]([O:13][CH2:14][C:15]3[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=3)=[CH:9][C:8]=2[F:21])[N:3]=1Participants
4
Reactant 1
Product 1
Reagents, catalysts & solvents 2
Procedure
MnO2 (2.66 g) was added to a solution of 3-amino-1-(4-benzyloxy-2-fluorophenyl) pyrazoline (3.86 g) in CH2Cl2 (40 mL), and the mixture was stirred at room temperature for 4 hours. The precipitate (MnO2) was filtered off, and the filtrate was concentrated. The residue was purified by flash chromatography on silica gel (EtOAc/hexane 1/9, 1/4, 1/2 and 1/1) and crystallization from EtOAc/hexane to yield 1.04 g of the title compound.