1-(4-Chloro-3-ethoxyphenyl)piperazine dihydrochloride → 1-[4-(4-chloro-3-ethoxyphenyl)piperazin-1-yl]-2-[3-(1H-imidazol-2-yl)pyrazolo[3,4-b]pyridin-1-yl]ethanone
Reaction equation
Cl.Cl.[Cl:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]2)=[CH:6][C:5]=1[O:16][CH2:17][CH3:18].[NH:19]1[CH:23]=[CH:22][N:21]=[C:20]1[C:24]1[C:32]2[C:27](=[N:28][CH:29]=[CH:30][CH:31]=2)[N:26]([CH2:33][C:34](O)=[O:35])[N:25]=1>>[Cl:3][C:4]1[CH:9]=[CH:8][C:7]([N:10]2[CH2:11][CH2:12][N:13]([C:34](=[O:35])[CH2:33][N:26]3[C:27]4=[N:28][CH:29]=[CH:30][CH:31]=[C:32]4[C:24]([C:20]4[NH:19][CH:23]=[CH:22][N:21]=4)=[N:25]3)[CH2:14][CH2:15]2)=[CH:6][C:5]=1[O:16][CH2:17][CH3:18]Participants
3
Procedure
The title compound was prepared following Protocol A. 1-(4-Chloro-3-ethoxyphenyl)piperazine dihydrochloride and [3-(1H-imidazol-2-yl)pyrazolo[3,4-b]pyridin-1-yl]acetic acid were used as the coupling components. The crude product was purified by silica gel chromatography (4% to 15% MeOH in CH2Cl2) to provide 1-[4-(4-chloro-3-ethoxyphenyl)piperazin-1-yl]-2-[3-(1H-imidazol-2-yl)pyrazolo[3,4-b]pyridin-1-yl]ethanone as a tan solid (25 mg): 1H NMR (CDCl3, 400 MHz) δ 8.79 (dd, 0.6H), 8.66 (dd, 0.4H), 8.57-8.54 (m, 1H), 7.29-7.19 (m, 4H), 6.49-6.40 (m, 2H), 5.45 (s, 0.7H), 5.43 (s, 1.3H), 4.10-4.04 (m, 2H), 3.81-3.69 (m, 4H), 3.23-3.16 (m, 4H), 1.50-1.45 (m, 3H); LC/MS m/z (M+H)+ 466.4.
Workup
- customThe title compound was prepared
- customThe crude product was purified by silica gel chromatography (4% to 15% MeOH in CH2Cl2)
Sources & evidence
- ORD record
- ord-3ece665c43314e38812a86a1bf0dca3d
- Source dataset
- uspto-grants-2013_02
- Patent number
- US08383630B2
Reaction notes
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