Water → [1-(2-Amino-5-phenylcarbamoyl-phenyl)-piperidin-4-ylmethyl]-carbamic acid tert-butyl ester

HRID 1773577Notes

Reaction equation

[C:1]([O:5][C:6](=[O:33])[NH:7][CH2:8][CH:9]1[CH2:14][CH2:13][N:12]([C:15]2[CH:20]=[C:19]([C:21](=[O:29])[NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)[CH:18]=[CH:17][C:16]=2[N+:30]([O-])=O)[CH2:11][CH2:10]1)([CH3:4])([CH3:3])[CH3:2].C(OCC)(=O)C.O.[Cl-].[NH4+]>C(O)C.[Fe]>[C:1]([O:5][C:6](=[O:33])[NH:7][CH2:8][CH:9]1[CH2:14][CH2:13][N:12]([C:15]2[CH:20]=[C:19]([C:21](=[O:29])[NH:22][C:23]3[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=3)[CH:18]=[CH:17][C:16]=2[NH2:30])[CH2:11][CH2:10]1)([CH3:4])([CH3:2])[CH3:3]

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of [1-(2-nitro-5-phenylcarbamoyl-phenyl)-piperidin-4-ylmethyl]-carbamic acid tert-butyl ester (0.13 g, 0.286 mmol) in a mixture of ethanol (8 mL), ethyl acetate (3 mL) and water (3 mL) were added ammonium chloride (0.12 g, 7.6 mmol) and iron powder (0.12 g, 7.5 mmol) and the resulting mixture was heated at 80° C. for 4 hours. The reaction mixture was filtered through a CELITE™ pad, the filter cake was washed with ethyl acetate. The filtrate was washed with and aqueous solution of sodium bicarbonate (5%) and with brine, dried over anhydrous sodium sulfate, filtered and evaporated under reduced pressure to afford 0.12 g (quantitative yield) of [1-(2-amino-5-phenylcarbamoyl-phenyl)-piperidin-4-ylmethyl]-carbamic acid tert-butyl ester as light yellow foam.

Workup

filtrationThe reaction mixture was filtered through a CELITE™ pad
washthe filter cake was washed with ethyl acetate
washThe filtrate was washed with and aqueous solution of sodium bicarbonate (5%)
dry with materialwith brine, dried over anhydrous sodium sulfate
filtrationfiltered
customevaporated under reduced pressure

Sources & evidence

ORD record: ord-3bd1241678184f7ba5453fea04b83d3d
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09255110B2

Reaction notes

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