Diethyl Ether → 1-{5-[10-Chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridin-2-yl}ethanone

HRID 1399002Notes

Reaction equation

HRID 1399002 reaction equation
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:16]4[C:17]([CH3:24])=[CH:18][C:19](C#N)=[N:20][CH:21]=4)[CH2:12][CH2:13][CH2:14][CH2:15][N:7]3[C:6]=2[C:5]([CH:25]([CH2:28][CH3:29])[CH2:26][CH3:27])=[CH:4][CH:3]=1.C[Mg]Br.C([O:35][CH2:36][CH3:37])C.C(=O)([O-])O.[Na+]>O1CCCC1.Cl>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:16]4[C:17]([CH3:24])=[CH:18][C:19]([C:36](=[O:35])[CH3:37])=[N:20][CH:21]=4)[CH2:12][CH2:13][CH2:14][CH2:15][N:7]3[C:6]=2[C:5]([CH:25]([CH2:28][CH3:29])[CH2:26][CH3:27])=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 3283Diethyl EtherHCID 516892Sodium BicarbonateHCID 577859415-[10-Chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridine-2-carbonitrileHCID 178418573HCID 178418573, compound

Product 1

HCID 577858961-{5-[10-Chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridin-2-yl}ethanoneYield 81.4%

Reagents, catalysts & solvents 2

HCID 313Hydrochloric AcidSolventHCID 8028TetrahydrofuranSolvent

Procedure

Under nitrogen atmosphere to a solution of 5-[10-chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridine-2-carbonitrile (Example 59; 70.0 mg, 0.172 mmol) in tetrahydrofuran (2 mL) was added 3M methylmagnesium bromide solution in diethyl ether (0.115 mL, 0.345 mmol) at 0° C. After the resultant mixture was stirred at room temperature for 30 min, the mixture was diluted with 0.1N hydrochloric acid (5 mL) at 0° C. After the resultant mixture was stirred at room temperature for 30 min, the mixture was neutralized with aqueous sodium hydrogen carbonate and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture to give, the title compound as a solid (59.6 mg, 0.140 mmol, 81%). Analytically pure material was obtained by recrystallization from ethyl acetate/n-hexane.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture
  7. customto give

Sources & evidence

ORD record
ord-3e4b88b223ef4a2cade17dd547aabd24
Source dataset
uspto-grants-2014_12
Patent number
US08901141B2

Reaction notes

Loading…