Sodium borohydride → 1-[9-Chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine

HRID 1628925Notes

Reaction equation

HRID 1628925 reaction equation
[CH2:1]([Mg]Br)[CH3:2].[Cl:5][C:6]1[CH:7]=[CH:8][C:9]([C:28]#[N:29])=[C:10]2[C:14]=1[N:13]=[C:12]1[N:15]([C:19]3[C:24]([Cl:25])=[CH:23][C:22]([Cl:26])=[CH:21][C:20]=3[Cl:27])[CH2:16][CH2:17][CH2:18][N:11]21.[BH4-].[Na+]>O1CCCC1.CC(O)C.O>[Cl:5][C:6]1[C:14]2[N:13]=[C:12]3[N:15]([C:19]4[C:24]([Cl:25])=[CH:23][C:22]([Cl:26])=[CH:21][C:20]=4[Cl:27])[CH2:16][CH2:17][CH2:18][N:11]3[C:10]=2[C:9]([CH:28]([NH2:29])[CH2:1][CH3:2])=[CH:8][CH:7]=1

Participants

7

Reactant 3

HCID 4311764Sodium borohydrideHCID 57786379HCID 57786379, compoundHCID 178418443HCID 178418443, compound2×

Product 1

HCID 577861491-[9-Chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 3776IsopropanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

Ethylmagnesium bromide (3 M solution in diethyl ether, 2.58 mL, 7.74 mmol) was added to a stirred solution of 9-chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbonitrile (317 mg, 0.773 mmol) in tetrahydrofuran (7 mL) at 0° C. The resultant mixture was stirred at 60° C. for 1 hr. Ethylmagnesium bromide (3 M solution in diethyl ether, 2.58 mL, 7.74 mmol) was added to the reaction mixture at room temperature. The resultant mixture was stirred at 60° C. for 30 min. A suspension of sodium tetrahydroborate (585 mg, 15.5 mmol) in 2-propanol (7 mL) was added at room temperature. The resultant mixture was stirred at room temperature for 1 h, diluted with water, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to give the title compound as a crude amorphous solid (392 mg).

Workup

  1. additionwas added at room temperature
  2. extractionextracted with ethyl acetate
  3. washThe combined organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-0fe8d387350543cabdcc1b523e89ca5e
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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