HCID 57786107, compound → HCID 57785912, compound

HRID 1628815Notes

Reaction equation

HRID 1628815 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH:24]=[O:25])=[C:6]2[C:10]=1[N:9]=[C:8]1[N:11]([C:15]3[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=3[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]21.[CH2:26]([Mg]Br)[CH3:27]>O1CCCC1>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=4[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:24]([OH:25])[CH2:26][CH3:27])=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 57786107HCID 57786107, compoundHCID 178418443HCID 178418443, compound

Product 1

HCID 57785912HCID 57785912, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 9-chloro-1-(2-chloro-4-methoxyphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (128.4 mg, 0.341 mmol) in tetrahydrofuran (4.0 mL) was added ethylmagnesium bromide (3.0 M solution in diethyl ether, 0.17 mL, 0.512 mmol) at 0° C. The reaction mixture was stirred at room temperature for 1 hr. The mixture was quenched with aqueous saturated ammonium chloride and extracted with ethyl acetate (×3). The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 0-50% ethyl acetate/n-hexane gradient mixture to give the title compound as a colorless amorphous (122.5 mg, 0.301 mmol, 88%).

Workup

  1. customThe mixture was quenched with aqueous saturated ammonium chloride
  2. extractionextracted with ethyl acetate (×3)
  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 silica gel column chromatography
  8. washeluting with a 0-50% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record
ord-3ec42aa96763465bb08f48604668095b
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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