Potassium Carbonate → {2-(4-Bromo-phenyl)-2-[4-(pyrazin-2-yloxy)-phenyl]-ethyl}-methyl-amine

HRID 45522

Reaction equation

HRID 45522 reaction equation
C(OC(=O)[N:7]([CH2:9][CH:10]([C:18]1[CH:23]=[CH:22][C:21]([Br:24])=[CH:20][CH:19]=1)[C:11]1[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][CH:12]=1)[CH3:8])(C)(C)C.Cl[C:27]1[CH:32]=[N:31][CH:30]=[CH:29][N:28]=1.C([O-])([O-])=O.[K+].[K+]>CN(C)C=O>[Br:24][C:21]1[CH:20]=[CH:19][C:18]([CH:10]([C:11]2[CH:12]=[CH:13][C:14]([O:17][C:27]3[CH:32]=[N:31][CH:30]=[CH:29][N:28]=3)=[CH:15][CH:16]=2)[CH2:9][NH:7][CH3:8])=[CH:23][CH:22]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 73277ChloropyrazineHCID 59331933[2-(4-Bromo-phenyl)-2-(4-hydroxy-phenyl)-ethyl]-methyl-carbamic acid tert-butyl ester

Product 1

HCID 59331924{2-(4-Bromo-phenyl)-2-[4-(pyrazin-2-yloxy)-phenyl]-ethyl}-methyl-amineYield 68.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of [2-(4-Bromo-phenyl)-2-(4-hydroxy-phenyl)-ethyl]-methyl-carbamic acid tert-butyl ester (125 mg, 0.31 mmol), 2-chloropyrazine (35.2 mg, 0.31 mmol) and K2CO3 (213 mg, 1.54 mmol) in dimethylformamide (8 ml) was heated to 100° C. for 17 hours. Upon cooling, the solvent was removed under reduced pressure and the residue was partitioned between ethyl acetate and saturated NaHCO3 solution. The organic layer was dried (MgSO4), filtered and concentrated. The crude product was then treated with saturated HCl in diethyl ether (15 ml) and stirred at room temperature for 72 hours. The solvent was then removed under reduced pressure and the crude product was purified by Phenomenex_Strata_SCX column chromatography eluting with methanol followed by 2N ammonia in methanol to afford the desired product (82 mg). LC/MS: (PS-B3) Rt 3.17 [M+H]+ 384.

Workup

  1. temperatureUpon cooling
  2. customthe solvent was removed under reduced pressure
  3. customthe residue was partitioned between ethyl acetate and saturated NaHCO3 solution
  4. dry with materialThe organic layer was dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. additionThe crude product was then treated with saturated HCl in diethyl ether (15 ml)
  8. customThe solvent was then removed under reduced pressure
  9. customthe crude product was purified by Phenomenex_Strata_SCX column chromatography
  10. washeluting with methanol

Sources & evidence

ORD record
ord-3c58d8d63c0c45d781ee96c62844aec0
Source dataset
uspto-grants-2013_09
Patent number
US08541461B2

Linked notes

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