1-benzyl-N-[(2-nitrophenyl)methyl]piperidin-4-amine → N-((2-aminophenyl)methyl)-1-benzylpiperidin-4-amine

HRID 2250241Notes

Reaction equation

[CH2:1]([N:8]1[CH2:13][CH2:12][CH:11]([NH:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=2[N+:22]([O-])=O)[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>C(O)(=O)C.[Zn]>[NH2:22][C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][C:16]=1[CH2:15][NH:14][CH:11]1[CH2:12][CH2:13][N:8]([CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH2:9][CH2:10]1

Participants

Conditions

Temperature: 60 °C

Procedure

(1-Benzyl-piperidin-4-yl)-(2-nitro-benzyl)-amine (1.2 g, 3.7 mmol) and zinc dust (1 g, excess) were combined in 75% aqueous acetic acid (16 mL) and stirred at 60° C. for 2 h. After cooling to room temperature, the solvents were removed in vacuo and the resultant crude dissolved in water (10 mL), followed by addition of ammonium hydroxide until pH 3 was attained. The solution was extracted with methylene chloride (3×). The organic layers were pooled together washed with water (2×), brine (2×), dried over sodium sulfate, filtered, and concentrated to afford 0.8 g (73%) of the desired product. 1H-NMR (CD3OD) δ 2.50 (m, 2H), 3.20 (m, 2H), 3.49 (dd, J=7.0, 7.3, 1H), 3.62 (m, 4H), 4.20 (s, 2H), 4.36 (s, 2H), 7.04 (m, 2H), 7.32 (dd, J=7.3, 7.6, 1H), 7.41 (d, J=7.9, 1H), 7.50 (m, 5H). Mass spec.: 296.40 (MH)+.

Workup

temperatureAfter cooling to room temperature
customthe solvents were removed in vacuo
dissolutionthe resultant crude dissolved in water (10 mL)
additionfollowed by addition of ammonium hydroxide until pH 3
extractionThe solution was extracted with methylene chloride (3×)
washThe organic layers were pooled together washed with water (2×), brine (2×)
dry with materialdried over sodium sulfate
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-516c80337ee8498dac6f541d92210600
Source dataset: uspto-grants-2008_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07314883B2

Reaction notes

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