1-(2-Nitro-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)urea → 1-(2-Amino-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)urea

HRID 2201703Notes

Reaction equation

HRID 2201703 reaction equation
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([C:10]2[S:11][CH:12]=[CH:13][CH:14]=2)=[CH:6][C:5]=1[NH:15][C:16]([NH:18][CH2:19][CH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1)=[O:17])([O-])=O>CO.[Pd]>[NH2:1][C:4]1[CH:9]=[CH:8][C:7]([C:10]2[S:11][CH:12]=[CH:13][CH:14]=2)=[CH:6][C:5]=1[NH:15][C:16]([NH:18][CH2:19][CH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1)=[O:17]

Participants

4

Reactant 1

HCID 709815901-(2-Nitro-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)urea

Product 1

HCID 867125351-(2-Amino-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)ureaYield 65%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

To a solution of 1-(2-nitro-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)urea (0.10 g, 0.28 mmol, 1.0 equiv.) in methanol was added Pd/C (0.03 g, 0.03 mmol, 0.10 equiv.). The reaction mixture was stirred at room temperature under H2 balloon pressure for 1h. The reaction was filtered through celite and concentrated under reduced pressure. The crude solid was washed with ether to obtain of pure 1-(2-amino-5-(thiophen-2-yl)phenyl)-3-(piperidin-4-ylmethyl)urea (0.06 g, 65% yield). ESI+ MS: m/z 331 ([M]+); 1H NMR (500 MHz, d6-DMSO): δ 7.64 (d, J=12.0 Hz, 2H), 7.33 (d, J=5.5 Hz, 1H), 7.17 (d, J=3.0 Hz, 1H), 7.10-7.09 (m, 1H), 7.03 (t, J=5.0 Hz, 1H), 6.71 (d, J=8.0 Hz, 1H), 6.34 (m, 1H), 4.90-4.89 (bs, 2H), 3.16 (d, J=12.5 Hz, 2H), 2.99 (t, J=6.0 Hz, 3H), 2.65 (t, J=12.5 Hz, 2H), 1.71 (d, J=13.0 Hz, 1H), 1.62-1.60 (m, 2H), 1.20-1.13 (m, 2H).

Workup

  1. filtrationThe reaction was filtered through celite and
  2. concentrationconcentrated under reduced pressure
  3. washThe crude solid was washed with ether

Sources & evidence

ORD record
ord-74201042c0b64bd08e32636ae7fe4b7d
Source dataset
uspto-grants-2016_06
Patent number
US09365498B2

Reaction notes

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