tert-Butyl piperazine-1-carboxylate → Tert-butyl 4-(3-(5-(3,4-dimethoxyphenyl)-7-(trifluoromethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidin-2-yl)benzoyl)piperazine-1-carboxylate
Reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]2[CH2:16][CH:15]([C:17]([F:20])([F:19])[F:18])[N:14]3[N:21]=[C:22]([C:24]4[CH:25]=[C:26]([CH:30]=[CH:31][CH:32]=4)[C:27](O)=[O:28])[CH:23]=[C:13]3[NH:12]2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].[N:33]1([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]1>>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]2[CH2:16][CH:15]([C:17]([F:20])([F:18])[F:19])[N:14]3[N:21]=[C:22]([C:24]4[CH:25]=[C:26]([CH:30]=[CH:31][CH:32]=4)[C:27]([N:36]4[CH2:37][CH2:38][N:33]([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[CH2:34][CH2:35]4)=[O:28])[CH:23]=[C:13]3[NH:12]2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10]Participants
3
Reactant 2
Product 1
Procedure
Example ER-896388 was prepared in two steps from 3-(5-(3,4-dimethoxyphenyl)-7-(trifluoromethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidin-2-yl)benzoic acid (25 mg, 0.056 mmol) and commercially available tert-butyl piperazine-1-carboxylate (42 mg, 0.224 mmol) in a manner similar to that of example D-6 to afford intermediate tert-butyl 4-(3-(5-(3,4-dimethoxyphenyl)-7-(trifluoromethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidin-2-yl)benzoyl)piperazine-1-carboxylate (18 mg, 0.029 mmol, 52% yield). Then, this intermediate (16 mg, 0.026 mmol) was treated with HCl in a manner similar to that of example ER-897560 to afford the desired product ER-896388 (14 mg, 98% yield).
Sources & evidence
- ORD record
- ord-a3f2a0c86b044ff8b796e2a70a6e3dc0
- Source dataset
- uspto-grants-2016_09
- Patent number
- US09446046B2
Reaction notes
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