Potassium Hydroxide → (R)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylenepentanoic acid

HRID 588308Notes

Reaction equation

HRID 588308 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:10](=[CH2:14])[C:11]([OH:13])=[O:12])=[CH:3][CH:2]=1.[OH-].[K+:30]>C(O)C>[K+:30].[C:1]1([C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[CH:2]=[CH:3][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:10](=[CH2:14])[C:11]([O-:13])=[O:12])=[CH:5][CH:6]=1.[C:1]1([C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[CH:2]=[CH:3][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:10](=[CH2:14])[C:11]([OH:13])=[O:12])=[CH:5][CH:6]=1

Participants

5

Reactant 2

HCID 14797Potassium HydroxideHCID 46193439(R)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylenepentanoic acid2×

Product 2

HCID 46193439(R)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylenepentanoic acidHCID 66957978HCID 66957978, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

500 mg (R)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylenepentanoic acid (2-a, R1=Boc, R2=H, R3=CO2H) is added to ethanol (5 ml) at room temperature. 2.6 ml of a 0.5 M Potassium hydroxide in ethanol solution is added to the mixture over a period of 5 minutes. The resulting mixture is stirred for 1 h at room temperature. The solvent is then removed under reduced pressure. Toluene (10 ml) is added to the mixture. The solvent is then removed under reduced pressure to give (R)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylenepentanoic acid potassium salt (2-a, R1=Boc, R2=H, R3=CO2K). 1H NMR (DMSO): 1.35 (9H), 2.24-2.37 (2H), 2.67-2.84 (2H), 3.69-3.80 (1H), 5.04 (1H), 5.79 (1H), 7.12-7.17, 7.23-7.35, 7.42-7.46, 7.54-7.57, 7.62-7.67.

Workup

  1. customThe solvent is then removed under reduced pressure
  2. additionToluene (10 ml) is added to the mixture
  3. customThe solvent is then removed under reduced pressure

Sources & evidence

ORD record
ord-8c01f864008442e7ae3586c801ae7129
Source dataset
uspto-grants-2016_01
Patent number
US09227934B2

Reaction notes

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