Potassium Carbonate → 2-(1-(1-(3-Methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-1H-benzo[d]imidazol-5-yl)piperidin-4-yl)propan-2-amine

HRID 2178316Notes

Reaction equation

HRID 2178316 reaction equation
I[C:2]1[CH:29]=[CH:28][C:5]2[N:6]([CH2:9][C:10]3[CH:15]=[CH:14][C:13]([O:16][CH2:17][C:18]4[CH:19]=[N:20][C:21]([O:24][CH3:25])=[CH:22][CH:23]=4)=[C:12]([O:26][CH3:27])[CH:11]=3)[CH:7]=[N:8][C:4]=2[CH:3]=1.Cl.Cl.[NH:32]1[CH2:37][CH2:36][CH:35]([C:38]([NH2:41])([CH3:40])[CH3:39])[CH2:34][CH2:33]1.C(=O)([O-])[O-].[K+].[K+].N1CCC[C@H]1C(O)=O>CS(C)=O.[OH-].[NH4+].C(OCC)(=O)C.C(#N)C.[Cu]I>[CH3:27][O:26][C:12]1[CH:11]=[C:10]([CH:15]=[CH:14][C:13]=1[O:16][CH2:17][C:18]1[CH:19]=[N:20][C:21]([O:24][CH3:25])=[CH:22][CH:23]=1)[CH2:9][N:6]1[C:5]2[CH:28]=[CH:29][C:2]([N:32]3[CH2:37][CH2:36][CH:35]([C:38]([NH2:41])([CH3:40])[CH3:39])[CH2:34][CH2:33]3)=[CH:3][C:4]=2[N:8]=[CH:7]1

Participants

10

Reactant 4

HCID 11430Potassium CarbonateHCID 145742L-Proline2×HCID 686878612-(Piperidin-4-yl)propan-2-amine dihydrochlorideHCID 1181141105-iodo-1-(3-methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-1H-benzo[d]imidazole

Product 1

HCID 1180097822-(1-(1-(3-Methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-1H-benzo[d]imidazol-5-yl)piperidin-4-yl)propan-2-amineYield 45.3%

Reagents, catalysts & solvents 5

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 679Dimethyl SulfoxideSolventHCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolventHCID 14923Ammonium HydroxideSolvent

Conditions

Temperature
100 °C

Procedure

To a stirred suspension of 5-iodo-1-(3-methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-1H-benzo[d]imidazole (0.15 g, 0.30 mmol) in dimethyl sulfoxide (5 mL) was added 2-(piperidin-4-yl)propan-2-amine dihydrochloride (0.19 g, 0.90 mmol), copper(I) iodide (0.005 g, 0.030 mmol), potassium carbonate (0.25 g, 1.80 mmol), and L-proline (0.007 g, 0.057 mmol). The light yellow reaction mixture was heated to 100° C. After 24 h, an additional portion of L-proline (0.007 g, 0.057 mmol) was added and heating continued. After an additional 5 h, the reaction mixture was allowed to cool to room temperature and was diluted with ammonium hydroxide solution and ethyl acetate. The organic phase was separated and washed with saturated sodium bicarbonate solution (×2), brine, dried over magnesium sulfate, filtered, and concentrated. Chromatographic purification (Biotage, 10 g SiO2 column, 10% methanol/dichloromethane to 3 M ammonia in methanol/dichloromethane elute) provided an oil. The oil was dissolved in aqueous acetonitrile and lyophilized to afford 0.070 g (45%) of the product as tan solid:

Workup

  1. temperatureheating
  2. waitAfter an additional 5 h
  3. temperatureto cool to room temperature
  4. customThe organic phase was separated
  5. washwashed with saturated sodium bicarbonate solution (×2), brine
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customChromatographic purification (Biotage, 10 g SiO2 column, 10% methanol/dichloromethane to 3 M ammonia in methanol/dichloromethane elute)
  10. customprovided an oil

Sources & evidence

ORD record
ord-4d5c57df41694272a1b4511edf0f2830
Source dataset
uspto-grants-2015_06
Patent number
US09067914B1

Reaction notes

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