Iodoethane → 2-[9-Chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]butanenitrile

HRID 1399135Notes

Reaction equation

HRID 1399135 reaction equation
[CH3:1][C:2](C)([O-])C.[K+].[Cl:7][C:8]1[C:16]2[N:15]=[C:14]3[N:17]([C:21]4[C:22]([CH3:30])=[N:23][C:24]([O:28][CH3:29])=[N:25][C:26]=4[CH3:27])[CH2:18][CH2:19][CH2:20][N:13]3[C:12]=2[C:11]([CH2:31][C:32]#[N:33])=[CH:10][CH:9]=1.C(I)C>O1CCCC1.[Cl-].[NH4+]>[Cl:7][C:8]1[C:16]2[N:15]=[C:14]3[N:17]([C:21]4[C:22]([CH3:30])=[N:23][C:24]([O:28][CH3:29])=[N:25][C:26]=4[CH3:27])[CH2:18][CH2:19][CH2:20][N:13]3[C:12]=2[C:11]([CH:31]([CH2:1][CH3:2])[C:32]#[N:33])=[CH:10][CH:9]=1

Participants

6

Reactant 3

HCID 6340IodoethaneHCID 23665647Potassium tert-butoxideHCID 57786008[9-Chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]acetonitrile

Product 1

HCID 577857892-[9-Chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]butanenitrileYield 79.3%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 25517Ammonium ChlorideSolvent

Conditions

Temperature
0 °C

Procedure

Potassium t-butoxide (908 mg, 8.09 mmol) was added to a stirred solution of [9-chloro-1-(2-methoxy-4,6-dimethylpyrimidin-5-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]acetonitrile (1.41 g, 3.68 mmol) and ethyl iodide (1.43 g, 9.20 mmol) in tetrahydrofuran (18 mL) at 0° C., and the mixture was stirred at 0° C. for 50 min. 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 70-100% ethyl acetate/n-hexane gradient mixture. The filtrate was concentrated in vacuo to give the title compound as a colorless solid (1.20 g, 2.92 mmol, 79%).

Workup

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash column chromatography on silica gel eluting with a 70-100% ethyl acetate/n-hexane gradient mixture
  7. concentrationThe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-3f168f647a744798ad8d4043025da1d6
Source dataset
uspto-grants-2014_12
Patent number
US08901141B2

Reaction notes

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