Water → 2-Bromo-1-(2,4-Dichlorophenyl)-3-methyl-5-piperidin-1-yl-1,5,6,7-tetrahydropyrrolo[3,2-c]pyridine-4-one

HRID 1790041Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:17]2[CH2:16][CH2:15][N:14]([N:18]3[CH2:23][CH2:22][CH2:21][CH2:20][CH2:19]3)[C:13](=[O:24])[C:12]=2[C:11]([CH3:25])=[CH:10]1.[Br:26]N1C(=O)CCC1=O.O>CN(C=O)C>[Br:26][C:10]1[N:9]([C:3]2[CH:4]=[CH:5][C:6]([Cl:8])=[CH:7][C:2]=2[Cl:1])[C:17]2[CH2:16][CH2:15][N:14]([N:18]3[CH2:19][CH2:20][CH2:21][CH2:22][CH2:23]3)[C:13](=[O:24])[C:12]=2[C:11]=1[CH3:25]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 1-(2,4-dichlorophenyl)-3-methyl-5-(1-piperidinyl)-1,5,6,7-tetrahydro-4H-pyrrolo[3,2-c]pyridin-4-one (200 mg, 0.529 mmol, Example 16) at 0° C. in dry DMF was added NBS (N-bromosuccinimide) (99 mg, 0.555 mmol). The reaction mixture was stirred 1 h at 0° C., and then water was added. The resulting solution was extracted several times with Et2O, the combined organic extracts were dried over MgSO4 and evaporated. The residue was dissolved in CH2Cl2 and filtered through a pad of silica gel to give the title material (180 mg, 75% yield) as an orange solid, which was used in Example 19.

Workup

extractionThe resulting solution was extracted several times with Et2O
dry with materialthe combined organic extracts were dried over MgSO4
customevaporated
dissolutionThe residue was dissolved in CH2Cl2
filtrationfiltered through a pad of silica gel

Sources & evidence

ORD record: ord-fc4081945ad94a06b2047b2452355331
Source dataset: uspto-grants-2006_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07071207B2

Reaction notes

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