N-bromobutanimide → 1-[4-(4-Amino-3-bromo-phenyl)-piperidin-1-yl]-ethanone

HRID 1991989Notes

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:16])[CH3:15])[CH2:10][CH2:9]2)=[CH:4][CH:3]=1.C1C(=O)N([Br:24])C(=O)C1>C(Cl)Cl>[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:16])[CH3:15])[CH2:10][CH2:9]2)=[CH:4][C:3]=1[Br:24]

Participants

Conditions

Temperature: -78 °C

Procedure

A solution of 1-[4-(4-amino-phenyl)-piperidin-1-yl]-ethanone (as prepared in the previous step, 0.36 g, 1.66 mmol) in CH2Cl2 (10 mL) was cooled to −78° C. and treated with NBS (0.28 g, 1.58 mmol) as a suspension in CH2Cl2 (4 mL). The reaction was allowed to warm to room temperature and stir for 30 min. The reaction was diluted with CH2Cl2 and washed with saturated aqueous NaHCO3. The organic layer was dried over MgSO4 and concentrated in vacuo. The crude material was used directly in the next reaction. LC-MS (ESI, m/z): Calcd. for C13H17BrN2O 297.1 (M+H), found 297.1.

Workup

temperatureto warm to room temperature
washwashed with saturated aqueous NaHCO3
dry with materialThe organic layer was dried over MgSO4
concentrationconcentrated in vacuo
customThe crude material was used directly in the next reaction

Sources & evidence

ORD record: ord-663544d8744a4bb2a0a8d73362d6cc96
Source dataset: uspto-grants-2010_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07645755B2

Reaction notes

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