Hydrochloric Acid → (1-{3-[5-(4-Bromo-phenyl)-1H-imidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carbonyl}-2-methyl-propyl)-carbamic acid methyl ester

HRID 71678Notes

Reaction equation

HRID 71678 reaction equation
C(O[C:6]([N:8]1[CH:13]([C:14]2[NH:15][C:16]([C:19]3[CH:24]=[CH:23][C:22]([Br:25])=[CH:21][CH:20]=3)=[CH:17][N:18]=2)[CH:12]2[CH2:26][CH:9]1[CH2:10][CH2:11]2)=[O:7])(C)(C)C.Cl.[CH3:28][O:29][C:30]([NH:32][CH:33]([CH:37]([CH3:39])[CH3:38])C(O)=O)=[O:31].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(CC)C(C)C)(C)C>CO.O1CCOCC1>[CH3:28][O:29][C:30](=[O:31])[NH:32][CH:33]([C:6]([N:8]1[CH:13]([C:14]2[NH:15][C:16]([C:19]3[CH:24]=[CH:23][C:22]([Br:25])=[CH:21][CH:20]=3)=[CH:17][N:18]=2)[CH:12]2[CH2:26][CH:9]1[CH2:10][CH2:11]2)=[O:7])[CH:37]([CH3:39])[CH3:38]

Participants

8

Reactant 5

HCID 313Hydrochloric AcidHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 138211012-((Methoxycarbonyl)amino)-3-methylbutanoic acidHCID 596109073-[5-(4-Bromo-phenyl)-1H-imidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

Product 1

HCID 66620573(1-{3-[5-(4-Bromo-phenyl)-1H-imidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carbonyl}-2-methyl-propyl)-carbamic acid methyl esterYield 89%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
50 °C

Procedure

To a solution of 3-[5-(4-bromo-phenyl)-1H-imidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (1.0 g, 2.4 mmol) in methanol (20 mL) was added 4.0 M solution of HCl in dioxane (4.0 mL, excess). The mixture was stirred for 3 hours at 50° C. and concentrated under reduced pressure. The residue was treated with ether to remove excess HCl. The obtained white solid was dissolved in DMF (20 mL). To the solution was added 2-methoxycarbonylamino-3-methyl-butyric acid (0.46 g, 2.6 mmol), HATU (1.0 g, 2.6 mmol) and N,N-diisopropylethylamine (2.5 mL, 14.4 mmol). The mixture was stirred at ambient for 2 hours, and then the volatile component was removed in vacuo. The residue was dissolved in ethyl acetate (200 mL), washed with 1 N NaOH solution, water and brine, dried over MgSO4, filtered and concentrated in vacuo. The obtained residue was purified by flash chromatography to provide the desired product as a white solid (1.0 g, 89%). m/z 475.1, 477.1 (M+H)+.

Workup

  1. concentrationconcentrated under reduced pressure
  2. additionThe residue was treated with ether
  3. customto remove excess HCl
  4. dissolutionThe obtained white solid was dissolved in DMF (20 mL)
  5. stirringThe mixture was stirred at ambient for 2 hours
  6. customthe volatile component was removed in vacuo
  7. dissolutionThe residue was dissolved in ethyl acetate (200 mL)
  8. washwashed with 1 N NaOH solution, water and brine
  9. dry with materialdried over MgSO4
  10. filtrationfiltered
  11. concentrationconcentrated in vacuo
  12. customThe obtained residue was purified by flash chromatography

Sources & evidence

ORD record
ord-6fb28d2144154c629f50bf00966fd924
Source dataset
uspto-grants-2014_09
Patent number
US08822430B2

Reaction notes

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