Iodoethane → 5-[9-Chloro-6-(1-ethoxypropyl)-3,4-dihydropyrimido[1,2-a]benzimidazol-1(2H)-yl]-N,N,4-trimethylpyridin-2-amine

HRID 1399084Notes

Reaction equation

HRID 1399084 reaction equation
[H-].[Na+].[Cl:3][C:4]1[C:12]2[N:11]=[C:10]3[N:13]([C:17]4[CH:18]=[N:19][C:20]([N:24]([CH3:26])[CH3:25])=[CH:21][C:22]=4[CH3:23])[CH2:14][CH2:15][CH2:16][N:9]3[C:8]=2[C:7]([CH:27]([OH:30])[CH2:28][CH3:29])=[CH:6][CH:5]=1.[CH2:31](I)[CH3:32]>CN(C)C=O.[Cl-].[NH4+]>[Cl:3][C:4]1[C:12]2[N:11]=[C:10]3[N:13]([C:17]4[C:22]([CH3:23])=[CH:21][C:20]([N:24]([CH3:25])[CH3:26])=[N:19][CH:18]=4)[CH2:14][CH2:15][CH2:16][N:9]3[C:8]=2[C:7]([CH:27]([O:30][CH2:31][CH3:32])[CH2:28][CH3:29])=[CH:6][CH:5]=1

Participants

6

Reactant 3

HCID 6340IodoethaneHCID 24758Sodium hydrideHCID 577861671-{9-Chloro-1-[6-(dimethylamino)-4-methylpyridin-3-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl}propan-1-ol

Product 1

HCID 577860355-[9-Chloro-6-(1-ethoxypropyl)-3,4-dihydropyrimido[1,2-a]benzimidazol-1(2H)-yl]-N,N,4-trimethylpyridin-2-amineYield 50.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 25517Ammonium ChlorideSolvent

Procedure

Sodium hydride (60% in oil, 27.1 mg, 0.678 mmol) was added to a stirred solution of 1-{9-chloro-1-[6-(dimethylamino)-4-methylpyridin-3-yl]-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl}propan-1-ol (226 mg, 0.565 mmol) in N,N-dimethylformamide (5.0 mL) at room temperature. After stirring 5 min, ethyl iodide (132 mg, 0.848 mmol) was added to the mixture, and the mixture was stirred at room temperature for 6 hr. The mixture was diluted with aqueous saturated ammonium chloride, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 50-100% ethyl acetate/n-hexane gradient mixture. The filtrate was concentrated in vacuo to give the solid, which was recrystallized from ethyl acetate to give the title compound as a colorless crystal (121 mg, 0.283 mmol, 50%).

Workup

  1. stirringthe mixture was stirred at room temperature for 6 hr
  2. extractionextracted with ethyl acetate
  3. washThe combined organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by flash column chromatography on silica gel eluting with a 50-100% ethyl acetate/n-hexane gradient mixture
  8. concentrationThe filtrate was concentrated in vacuo
  9. customto give the solid, which
  10. customwas recrystallized from ethyl acetate

Sources & evidence

ORD record
ord-22df4f513b814d5cb55229c7d14d6b04
Source dataset
uspto-grants-2014_12
Patent number
US08901141B2

Reaction notes

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