Water → (2R,4S)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methyl-pentanoic acid benzyl ester

HRID 881884Notes

Reaction equation

HRID 881884 reaction equation
[C:1]1([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[CH:6]=[CH:5][C:4]([CH2:7][C@@H:8]([NH:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:9][C@@H:10]([CH3:14])[C:11]([OH:13])=[O:12])=[CH:3][CH:2]=1.[CH2:29](Br)[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C=O)C>[CH2:29]([O:12][C:11](=[O:13])[C@H:10]([CH3:14])[CH2:9][C@H:8]([NH:15][C:16]([O:18][C:19]([CH3:22])([CH3:20])[CH3:21])=[O:17])[CH2:7][C:4]1[CH:3]=[CH:2][C:1]([C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[CH:6][CH:5]=1)[C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1

Participants

6

Reactant 4

HCID 962WaterHCID 7498Benzyl BromideHCID 11430Potassium CarbonateHCID 46193546(2R,4S)-2-methyl-4-((2-methylpropan-2-yl)oxycarbonylamino)-5-(4-phenylphenyl)pentanoic acid

Product 1

HCID 67505752(2R,4S)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methyl-pentanoic acid benzyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (2R,4S)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methyl-pentanoic acid (prepared using the procedure described in WO 2008083967) (1.0 g, 2.61 mmol) and benzyl bromide (468 mg, 2.74 mmol) in DMF (15 mL) is added potassium carbonate (541 mg, 3.91 mmol) and the mixture is stirred at room temperature for 2 hours. Water is added and the mixture is extracted with ethyl acetate. The combined organic layers are washed with water and dried over magnesium sulfate. The solvent is removed under reduced pressure and the residual oil is purified by column chromatography using heptane/EtOAc (4:1) to furnish (2R,4S)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methyl-pentanoic acid benzyl ester.

Workup

  1. extractionthe mixture is extracted with ethyl acetate
  2. washThe combined organic layers are washed with water
  3. dry with materialdried over magnesium sulfate
  4. customThe solvent is removed under reduced pressure
  5. customthe residual oil is purified by column chromatography

Sources & evidence

ORD record
ord-f4697ae41fdc4b01a9b22ac4d04034ad
Source dataset
uspto-grants-2015_03
Patent number
US08993631B2

Reaction notes

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