Tetrahydrofuran → tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]-5-propanoyl-piperidine-1-carboxylate

HRID 1509489Notes

Reaction equation

HRID 1509489 reaction equation
[CH3:1][O:2][CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=2[N:9]=[C:8]1[C:16]([N:18]([CH2:38][CH:39]([CH3:41])[CH3:40])[C@H:19]1[CH2:24][C@@H:23]([C:25](=[O:30])N(OC)C)[CH2:22][N:21]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:20]1)=[O:17].[Cl-].[NH4+].[CH2:44]1COC[CH2:45]1>>[CH3:1][O:2][CH2:3][CH2:4][CH2:5][CH2:6][N:7]1[C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=2[N:9]=[C:8]1[C:16]([N:18]([CH2:38][CH:39]([CH3:40])[CH3:41])[C@H:19]1[CH2:24][C@@H:23]([C:25](=[O:30])[CH2:44][CH3:45])[CH2:22][N:21]([C:31]([O:33][C:34]([CH3:37])([CH3:35])[CH3:36])=[O:32])[CH2:20]1)=[O:17]

Participants

4

Reactant 3

HCID 8028TetrahydrofuranHCID 25517Ammonium ChlorideHCID 58355290tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]-5-[methoxy(methyl)carbamoyl]piperidine-1-carboxylate

Product 1

HCID 67025990tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]-5-propanoyl-piperidine-1-carboxylate

Procedure

To a solution of tert-butyl (3S,5R)-3-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]-5-[methoxy(methyl)carbamoyl]piperidine-1-carboxylate (22.7 g) in THF (20 ml) was added 1Methylmagnesium bromide-THF solution (119 ml) at room temperature, and the mixture was stirred at room temperature for 5 hr. The reaction mixture was poured into saturated aqueous ammonium chloride solution, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was subjected to silica gel column chromatography, and a fraction eluted with ethyl acetate-hexane (1:9-3:2) was concentrated under reduced pressure to give the object product (14.96 g).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with water and saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. washa fraction eluted with ethyl acetate-hexane (1:9-3:2)
  6. concentrationwas concentrated under reduced pressure

Sources & evidence

ORD record
ord-3973f5dd1e204c87a9ee3c1773154283
Source dataset
uspto-grants-2015_12
Patent number
US09221836B2

Reaction notes

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