1-Boc-4-(4-Nitrobenzyl)piperazine → tert-Butyl 4-((4-aminophenyl)methyl)piperazine-1-carboxylate
Reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([CH2:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-])=O)=[CH:17][CH:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]>[Pd]>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][N:11]([CH2:14][C:15]2[CH:16]=[CH:17][C:18]([NH2:21])=[CH:19][CH:20]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]Participants
3
Reactant 1
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 30 °C
Procedure
A solution of 4-(4-nitro-benzyl)-piperazine-1-carboxylic acid tert-butyl ester (2.82 g, 8.77 mmol) was hydrogenated on an H-Cube apparatus with a 5% Pd/C cartridge under the following conditions: flow rate=1 mL/min, heating column temperature=30° C., H2 pressure=40 bar. The material was passed through the column twice more in order to complete the reaction. Solvents were evaporated in vacuo. Purification of the residue on a 50-g Isolute SPE column on a FlashMaster system with 25-50% EtOAc-hexane afforded the title compound (1.70 g, 67%) as a yellow solid. Mass spectrum (ESI, m/z): Calcd. for C16H25N3O2, 292.2 (M+H). found 292.1.
Workup
- customthe reaction
- customSolvents were evaporated in vacuo
- customPurification of the residue on a 50-g Isolute SPE column on a FlashMaster system with 25-50% EtOAc-hexane
Sources & evidence
- ORD record
- ord-08501f47b75842979a5808ba9e26a2a3
- Source dataset
- uspto-grants-2015_12
- Patent number
- US09221797B2
Reaction notes
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