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

HRID 2168924Notes

Reaction equation

HRID 2168924 reaction equation
[CH:1]([C@@H:3]1[CH2:8][C@H:7]([N:9]([C:14]([C:16]2[N:20]([CH2:21][CH2:22][CH2:23][CH2:24][O:25][CH3:26])[C:19]3[CH:27]=[CH:28][CH:29]=[CH:30][C:18]=3[N:17]=2)=[O:15])[CH2:10][CH:11]([CH3:13])[CH3:12])[CH2:6][N:5]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:4]1)=[O:2].[Cl-].[NH4+].[CH2:40]1COCC1>>[OH:2][CH:1]([C@@H:3]1[CH2:8][C@H:7]([N:9]([C:14]([C:16]2[N:20]([CH2:21][CH2:22][CH2:23][CH2:24][O:25][CH3:26])[C:19]3[CH:27]=[CH:28][CH:29]=[CH:30][C:18]=3[N:17]=2)=[O:15])[CH2:10][CH:11]([CH3:12])[CH3:13])[CH2:6][N:5]([C:31]([O:33][C:34]([CH3:35])([CH3:37])[CH3:36])=[O:32])[CH2:4]1)[CH3:40]

Participants

4

Reactant 3

HCID 8028TetrahydrofuranHCID 25517Ammonium ChlorideHCID 58355644tert-butyl (3R,5S)-3-formyl-5-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-1-carboxylate

Product 1

HCID 58355349tert-butyl (3R,5S)-3-(1-hydroxyethyl)-5-[([1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-1-carboxylate

Procedure

To a solution of tert-butyl (3R,5S)-3-formyl-5-[{[1-(4-methoxybutyl)-1H-benzimidazol-2-yl]carbonyl}(2-methylpropyl)amino]piperidine-1-carboxylate (150 mg) in THF (10 ml) was added 3M-methyl magnesium bromide-ether solution (0.3 ml), and the mixture was stirred at room temperature for 1 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 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 (1:1-1:0) was concentrated under reduced pressure to give the object product (100 mg).

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with 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 (1:1-1:0)
  6. concentrationwas concentrated under reduced pressure

Sources & evidence

ORD record
ord-ca2c0097d23c4fc78b1e8804c82b5410
Source dataset
uspto-grants-2015_06
Patent number
US09045436B2

Reaction notes

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