Sodium Hydroxide → 3-Bromo-4-((1,4-dimethylpiperidin-4-yl)methoxy)-9H-dipyrido[2,3-b;4',3'-d]pyrrole-6-carbonitrile

HRID 60268Notes

Reaction equation

HRID 60268 reaction equation
[CH3:1][N:2]1[CH2:7][CH2:6][C:5]([CH2:9][O:10][C:11]2[C:19]3[C:18]4[CH:20]=[C:21]([C:24]#[N:25])[N:22]=[CH:23][C:17]=4[NH:16][C:15]=3[N:14]=[CH:13][CH:12]=2)([CH3:8])[CH2:4][CH2:3]1.C([O-])(=O)C.[Na+].[Br:31]Br.[OH-].[Na+]>C(O)(=O)C.O>[Br:31][C:12]1[CH:13]=[N:14][C:15]2[NH:16][C:17]3[CH:23]=[N:22][C:21]([C:24]#[N:25])=[CH:20][C:18]=3[C:19]=2[C:11]=1[O:10][CH2:9][C:5]1([CH3:8])[CH2:6][CH2:7][N:2]([CH3:1])[CH2:3][CH2:4]1

Participants

7

Reactant 4

HCID 14798Sodium HydroxideHCID 24408BromineHCID 517045Sodium AcetateHCID 583649994-((1,4-dimethylpiperidin-4-yl)methoxy)-9H-dipyrido[2,3-b;4',3'-d]pyrrole-6-carbonitrile

Product 1

HCID 532505503-Bromo-4-((1,4-dimethylpiperidin-4-yl)methoxy)-9H-dipyrido[2,3-b;4',3'-d]pyrrole-6-carbonitrileYield 38%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 962WaterSolvent

Procedure

A mixture of 4-((1,4-dimethylpiperidin-4-yl)methoxy)-9H-dipyrido[2,3-b;4′,3′-d]pyrrole-6-carbonitrile (50 mg, 0.16 mmol), sodium acetate (26 mg, 0.3 mmol), and bromine (32 L, 0.6 mmol) in acetic acid (1 mL) was stirred at ambient temperature for 10 minutes. The reaction mixture was diluted with water (1 mL) and basified to pH ˜8 by dropwise addition of 6N sodium hydroxide solution, producing a yellow precipitate. The solid was collected by centrifugation, dissolved in dimethylsulfoxide (2 mL), and purified by preparative HPLC [5-85% methanol in water (0.1% ammonium hydroxide) over 30 min, 35 mL/min] to afford the title compound as a white solid (25 mg, 38%). 1H NMR (500 MHz, d6-DMSO) δ 9.02 (d, J=8.7, 1H), 8.70 (d, J=9.9, 1H), 8.43 (s, 1H), 4.21 (s, 2H), 2.81 (m, 2H), 2.62 (m, 2H), 2.45 (s, 3H), 1.97 (m, 2H), 1.68 (m, 2H), 1.30 (s, 3H), NH signal not observed. LCMS (Method D): RT=8.660 min, M+H+=414.0/416.0.

Workup

  1. customproducing a yellow precipitate
  2. customThe solid was collected by centrifugation
  3. dissolutiondissolved in dimethylsulfoxide (2 mL)
  4. custompurified by preparative HPLC [5-85% methanol in water (0.1% ammonium hydroxide) over 30 min, 35 mL/min]

Sources & evidence

ORD record
ord-5285e07ae94d4c97afb9030c0a9d3577
Source dataset
uspto-grants-2016_09
Patent number
US09440976B2

Reaction notes

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