Boron tribromide → HCID 178440267、化合物
反応式
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[C:4]([Cl:9])[C:3]=1[N:10]1[C:14]2=[N:15][C:16]([CH2:20][C:21]3[CH:26]=[CH:25][CH:24]=[C:23]([O:27]C)[CH:22]=3)=[N:17][C:18](=[O:19])[C:13]2=[C:12]([CH:29]([CH3:31])[CH3:30])[NH:11]1.B(Br)(Br)Br>C(Cl)Cl>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[C:4]([Cl:9])[C:3]=1[N:10]1[C:14]2=[N:15][C:16]([CH2:20][C:21]3[CH:26]=[CH:25][CH:24]=[C:23]([OH:27])[CH:22]=3)=[N:17][C:18](=[O:19])[C:13]2=[C:12]([CH:29]([CH3:31])[CH3:30])[NH:11]1参加物
4
実験手順
To a stirred solution of 65 mg (0.14 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(3-methoxybenzyl)pyrazolo[3,4-d]pyrimidin-4-one in 1 mL of CH2Cl2 was added 1 mL(1 mmol ) of 1 M boron tribromide in CH2Cl2. The solution was stirred 1 h at ambient temperature and then cooled to 0° C. The reaction was quenched with 4 mL of 1 M aq. HCl. The mixture was poured into water and extracted with 1:1 THF-EtOAc. The organic extract was washed with brine, dried (MgSO4), and concentrated under reduced pressure to afford 63 mg (100%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(3-hydroxybenzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.46(br. s, 1H); 9.33(br. s, 1H); 7.96(s, 2H); 7.03(t, 1H, J=7.7 Hz); 6.55-7.08(m, 3H); 3.75(s, 2H); 3.19-3.36(m, 1H); 1.29(d, 6H, J=7.0 Hz).